# Cubic honeycomb

The cubic honeycomb or cubic cellulation is the only proper regular space-filling tessellation (or honeycomb) in Euclidean 3-space, made up of cubic cells. It has 4 cubes around every edge, and 8 cubes around each vertex. Its vertex figure is a regular octahedron. It is a self-dual tessellation with Schläfli symbol {4,3,4}. John Horton Conway calls this honeycomb a cubille.

Cubic honeycomb
TypeRegular honeycomb
FamilyHypercube honeycomb
Indexing J11,15, A1
W1, G22
Schläfli symbol{4,3,4}
Coxeter diagram
Cell type{4,3}
Face type{4}
Vertex figure
(octahedron)
Space group
Fibrifold notation
Pm3m (221)
4:2
Coxeter group${\tilde {C}}_{3}$ , [4,3,4]
Dualself-dual
Cell:
Propertiesvertex-transitive, regular

A geometric honeycomb is a space-filling of polyhedral or higher-dimensional cells, so that there are no gaps. It is an example of the more general mathematical tiling or tessellation in any number of dimensions.

Honeycombs are usually constructed in ordinary Euclidean ("flat") space, like the convex uniform honeycombs. They may also be constructed in non-Euclidean spaces, such as hyperbolic uniform honeycombs. Any finite uniform polytope can be projected to its circumsphere to form a uniform honeycomb in spherical space.

## Cartesian coordinates

The Cartesian coordinates of the vertices are:

(i, j, k)
for all integral values: i,j,k, with edges parallel to the axes and with an edge length of 1.

It is part of a multidimensional family of hypercube honeycombs, with Schläfli symbols of the form {4,3,...,3,4}, starting with the square tiling, {4,4} in the plane.

It is one of 28 uniform honeycombs using convex uniform polyhedral cells.

## Isometries of simple cubic lattices

Simple cubic lattices can be distorted into lower symmetries, represented by lower crystal systems:

Crystal system Monoclinic
Triclinic
Orthorhombic Tetragonal Rhombohedral Cubic
Unit cell Parallelepiped Rectangular cuboid Square cuboid Trigonal
trapezohedron
Cube
Point group
Order
Rotation subgroup
[ ], (*)
Order 2
[ ]+, (1)
[2,2], (*222)
Order 8
[2,2]+, (222)
[4,2], (*422)
Order 16
[4,2]+, (422)
, (*33)
Order 6
+, (33)
[4,3], (*432)
Order 48
[4,3]+, (432)
Diagram
Space group
Rotation subgroup
Pm (6)
P1 (1)
Pmmm (47)
P222 (16)
P4/mmm (123)
P422 (89)
R3m (160)
R3 (146)
Pm3m (221)
P432 (207)
Coxeter notation - []a×[]b×[]c [4,4]a×[]c - [4,3,4]a
Coxeter diagram - -

## Uniform colorings

There is a large number of uniform colorings, derived from different symmetries. These include:

Coxeter notation
Space group
Coxeter diagram Schläfli symbol Partial
honeycomb
Colors by letters
[4,3,4]
Pm3m (221)

=
{4,3,4} 1: aaaa/aaaa
[4,31,1] = [4,3,4,1+]
Fm3m (225)
= {4,31,1} 2: abba/baab
[4,3,4]
Pm3m (221)
t0,3{4,3,4} 4: abbc/bccd
[[4,3,4]]
Pm3m (229)
t0,3{4,3,4} 4: abbb/bbba
[4,3,4,2,]
or
{4,4}×t{} 2: aaaa/bbbb
[4,3,4,2,] t1{4,4}×{} 2: abba/abba
[,2,,2,] t{}×t{}×{} 4: abcd/abcd
[,2,,2,] = [4,(3,4)*] = t{}×t{}×t{} 8: abcd/efgh

### Projections

The cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements. The highest (hexagonal) symmetry form projects into a triangular tiling. A square symmetry projection forms a square tiling.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

It is related to the regular 4-polytope tesseract, Schläfli symbol {4,3,3}, which exists in 4-space, and only has 3 cubes around each edge. It's also related to the order-5 cubic honeycomb, Schläfli symbol {4,3,5}, of hyperbolic space with 5 cubes around each edge.

It is in a sequence of polychora and honeycomb with octahedral vertex figures.

It in a sequence of regular polytopes and honeycombs with cubic cells.

The cubic honeycomb has a lower symmetry as a runcinated cubic honeycomb, with two sizes of cubes. A double symmetry construction can be constructed by placing a small cube into each large cube, resulting in a nonuniform honeycomb with cubes, square prisms, and rectangular trapezoprisms (a cube with D2d symmetry). Its vertex figure is a triangular pyramid with its lateral faces augmented by tetrahedra.

The resulting honeycomb can be alternated to produce another nonuniform honeycomb with regular tetrahedra, two kinds of tetragonal disphenoids, triangular pyramids, and sphenoids. Its vertex figure has C3v symmetry and has 26 triangular faces, 39 edges, and 15 vertices.

The [4,3,4], , Coxeter group generates 15 permutations of uniform tessellations, 9 with distinct geometry including the alternated cubic honeycomb. The expanded cubic honeycomb (also known as the runcinated cubic honeycomb) is geometrically identical to the cubic honeycomb.

The [4,31,1], , Coxeter group generates 9 permutations of uniform tessellations, 4 with distinct geometry including the alternated cubic honeycomb.

This honeycomb is one of five distinct uniform honeycombs constructed by the ${\tilde {A}}_{3}$ Coxeter group. The symmetry can be multiplied by the symmetry of rings in the Coxeter–Dynkin diagrams:

### Rectified cubic honeycomb

Rectified cubic honeycomb
TypeUniform honeycomb
CellsOctahedron
Cuboctahedron
Schläfli symbolr{4,3,4} or t1{4,3,4}
r{4,31,1}
2r{4,31,1}
r{3}
Coxeter diagrams
=
=
= = =
Vertex figure
Cuboid
Space group
Fibrifold notation
Pm3m (221)
4:2
Coxeter group${\tilde {C}}_{3}$ , [4,3,4]
Dualoblate octahedrille
Cell:
Propertiesvertex-transitive, edge-transitive

The rectified cubic honeycomb or rectified cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of octahedra and cuboctahedra in a ratio of 1:1.

John Horton Conway calls this honeycomb a cuboctahedrille, and its dual an oblate octahedrille.

#### Projections

The rectified cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

There are four uniform colorings for the cells of this honeycomb with reflective symmetry, listed by their Coxeter group, and Wythoff construction name, and the Coxeter diagram below.

Symmetry [4,3,4]
${\tilde {C}}_{3}$ [1+,4,3,4]
[4,31,1], ${\tilde {B}}_{3}$ [4,3,4,1+]
[4,31,1], ${\tilde {B}}_{3}$ [1+,4,3,4,1+]
[3], ${\tilde {A}}_{3}$ Space groupPm3m
(221)
Fm3m
(225)
Fm3m
(225)
F43m
(216)
Coloring
Coxeter
diagram
Vertex figure
Vertex
figure
symmetry
D4h
[4,2]
(*224)
order 16
D2h
[2,2]
(*222)
order 8
C4v

(*44)
order 8
C2v

(*22)
order 4

This honeycomb can be divided on trihexagonal tiling planes, using the hexagon centers of the cuboctahedra, creating two triangular cupolae. This scaliform honeycomb is represented by Coxeter diagram , and symbol s3{2,6,3}, with coxeter notation symmetry [2+,6,3].

.

A double symmetry construction can be made by placing octahedra on the cuboctahedra, resulting in a nonuniform honeycomb with two kinds of octahedra (regular octahedra and triangular antiprisms). The vertex figure is a square bifrustum. The dual is composed of elongated square bipyramids.

### Truncated cubic honeycomb

Truncated cubic honeycomb
TypeUniform honeycomb
Schläfli symbolt{4,3,4} or t0,1{4,3,4}
t{4,31,1}
Coxeter diagrams
=
Cell type3.8.8, {3,4}
Face type{3}, {4}, {8}
Vertex figure
Isosceles square pyramid
Space group
Fibrifold notation
Pm3m (221)
4:2
Coxeter group${\tilde {C}}_{3}$ , [4,3,4]
DualPyramidille
Cell:
Propertiesvertex-transitive

The truncated cubic honeycomb or truncated cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of truncated cubes and octahedra in a ratio of 1:1.

John Horton Conway calls this honeycomb a truncated cubille, and its dual pyramidille.

#### Projections

The truncated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

There is a second uniform coloring by reflectional symmetry of the Coxeter groups, the second seen with alternately colored truncated cubic cells.

Construction Bicantellated alternate cubic Truncated cubic honeycomb
Coxeter group [4,31,1], ${\tilde {B}}_{3}$ [4,3,4], ${\tilde {C}}_{3}$ =<[4,31,1]>
Space groupFm3mPm3m
Coloring
Coxeter diagram =
Vertex figure

A double symmetry construction can be made by placing octahedra on the truncated cubes, resulting in a nonuniform honeycomb with two kinds of octahedra (regular octahedra and triangular antiprisms) and two kinds of tetrahedra (tetragonal disphenoids and digonal disphenoids). The vertex figure is an octakis square cupola.

### Bitruncated cubic honeycomb

Bitruncated cubic honeycomb

TypeUniform honeycomb
Schläfli symbol2t{4,3,4}
t1,2{4,3,4}
Coxeter-Dynkin diagram
Cell type(4.6.6)
Face typessquare {4}
hexagon {6}
Edge figureisosceles triangle {3}
Vertex figure
(tetragonal disphenoid)
Space group
Fibrifold notation
Coxeter notation
Im3m (229)
8o:2
[[4,3,4]]
Coxeter group${\tilde {C}}_{3}$ , [4,3,4]
DualOblate tetrahedrille
Disphenoid tetrahedral honeycomb
Cell:
Propertiesisogonal, isotoxal, isochoric

The bitruncated cubic honeycomb is a space-filling tessellation (or honeycomb) in Euclidean 3-space made up of truncated octahedra (or, equivalently, bitruncated cubes). It has 4 truncated octahedra around each vertex. Being composed entirely of truncated octahedra, it is cell-transitive. It is also edge-transitive, with 2 hexagons and one square on each edge, and vertex-transitive. It is one of 28 uniform honeycombs.

John Horton Conway calls this honeycomb a truncated octahedrille in his Architectonic and catoptric tessellation list, with its dual called an oblate tetrahedrille, also called a disphenoid tetrahedral honeycomb. Although a regular tetrahedron can not tessellate space alone, this dual has identical disphenoid tetrahedron cells with isosceles triangle faces.

#### Projections

The bitruncated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements. The highest (hexagonal) symmetry form projects into a nonuniform rhombitrihexagonal tiling. A square symmetry projection forms two overlapping truncated square tiling, which combine together as a chamfered square tiling.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

The vertex figure for this honeycomb is a disphenoid tetrahedron, and it is also the Goursat tetrahedron (fundamental domain) for the ${\tilde {A}}_{3}$ Coxeter group. This honeycomb has four uniform constructions, with the truncated octahedral cells having different Coxeter groups and Wythoff constructions. These uniform symmetries can be represented by coloring differently the cells in each construction.

Five uniform colorings by cell
Space groupIm3m (229)Pm3m (221)Fm3m (225)F43m (216)Fd3m (227)
Fibrifold8o:24:22:21o:22+:2
Coxeter group ${\tilde {C}}_{3}$ ×2
[[4,3,4]]
=[4[3]]
=
${\tilde {C}}_{3}$ [4,3,4]
=[2[3]]
=
${\tilde {B}}_{3}$ [4,31,1]
=<[3]>
=
${\tilde {A}}_{3}$ [3]

${\tilde {A}}_{3}$ ×2
[[3]]
=[[3]]
Coxeter diagram
truncated octahedra 1
1:1
:
2:1:1
::
1:1:1:1
:::
1:1
:
Vertex figure
Vertex
figure
symmetry
[2+,4]
(order 8)

(order 4)
[ ]
(order 2)
[ ]+
(order 1)
+
(order 2)
Image
Colored by
cell

Nonuniform variants with [4,3,4] symmetry and two types of truncated octahedra can be doubled by placing the two types of truncated octahedra to produce a nonuniform honeycomb with truncated octahedra and hexagonal prisms (as ditrigonal trapezoprisms). Its vertex figure is a C2v-symmetric triangular bipyramid.

This honeycomb can then be alternated to produce another nonuniform honeycomb with pyritohedral icosahedra, octahedra (as triangular antiprisms), and tetrahedra (as sphenoids). Its vertex figure has C2v symmetry and consists of 2 pentagons, 4 rectangles, 4 isosceles triangles (divided into two sets of 2), and 4 scalene triangles.

### Alternated bitruncated cubic honeycomb

Alternated bitruncated cubic honeycomb
TypeConvex honeycomb
Schläfli symbol2s{4,3,4}
2s{4,31,1}
sr{3}
Coxeter diagrams
=
=
=
Cellstetrahedron
icosahedron
Vertex figure
Coxeter group[[4,3<sup>+</sup>,4]], ${\tilde {C}}_{3}$ DualTen-of-diamonds honeycomb
Cell:
Propertiesvertex-transitive

The alternated bitruncated cubic honeycomb or bisnub cubic honeycomb is non-uniform, with the highest symmetry construction reflecting an alternation of the uniform bitruncated cubic honeycomb. A lower-symmetry construction involves regular icosahedra paired with golden icosahedra (with 8 equilateral triangles paired with 12 golden triangles). There are three constructions from three related Coxeter diagrams: , , and . These have symmetry [4,3+,4], [4,(31,1)+] and [3]+ respectively. The first and last symmetry can be doubled as [[4,3+,4]] and [[3]]+.

This honeycomb is represented in the boron atoms of the α-rhombihedral crystal. The centers of the icosahedra are located at the fcc positions of the lattice.

Five uniform colorings
Space groupI3 (204)Pm3 (200)Fm3 (202)Fd3 (203)F23 (196)
Fibrifold8−o422o+1o
Coxeter group[[4,3+,4]][4,3+,4][4,(31,1)+][[3]]+[3]+
Coxeter diagram
Order double full half quarter
double
quarter

### Cantellated cubic honeycomb

Cantellated cubic honeycomb
TypeUniform honeycomb
Schläfli symbolrr{4,3,4} or t0,2{4,3,4}
rr{4,31,1}
Coxeter diagram
=
Cellsrr{4,3}
r{4,3}
{4,3}
Vertex figure
(Wedge)
Space group
Fibrifold notation
Pm3m (221)
4:2
Coxeter group[4,3,4], ${\tilde {C}}_{3}$ Dualquarter oblate octahedrille
Cell:
Propertiesvertex-transitive

The cantellated cubic honeycomb or cantellated cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of rhombicuboctahedra, cuboctahedra, and cubes in a ratio of 1:1:3.

John Horton Conway calls this honeycomb a 2-RCO-trille, and its dual quarter oblate octahedrille.

#### Images

 It is closely related to the perovskite structure, shown here with cubic symmetry, with atoms placed at the center of the cells of this honeycomb.

#### Projections

The cantellated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

There is a second uniform colorings by reflectional symmetry of the Coxeter groups, the second seen with alternately colored rhombicuboctahedral cells.

Vertex uniform colorings by cell
Construction Truncated cubic honeycomb Bicantellated alternate cubic
Coxeter group [4,3,4], ${\tilde {C}}_{3}$ =<[4,31,1]>
[4,31,1], ${\tilde {B}}_{3}$ Space groupPm3mFm3m
Coxeter diagram
Coloring
Vertex figure
Vertex
figure
symmetry
[ ]
order 2
[ ]+
order 1

A double symmetry construction can be made by placing cuboctahedra on the rhombicuboctahedra, which results in the rectified cubic honeycomb, by taking the triangular antiprism gaps as regular octahedra, square antiprism pairs and zero-height tetragonal disphenoids as components of the cuboctahedron. Other variants result in cuboctahedra, square antiprisms, octahedra (as triangular antipodiums), and tetrahedra (as tetragonal disphenoids), with a vertex figure topologically equivalent to a cube with a triangular prism attached to one of its square faces.

#### Quarter oblate octahedrille

The dual of the cantellated cubic honeycomb is called a quarter oblate octahedrille, a catoptric tessellation with Coxeter diagram , containing faces from two of four hyperplanes of the cubic [4,3,4] fundamental domain.

It has irregular triangle bipyramid cells which can be seen as 1/12 of a cube, made from the cube center, 2 face centers, and 2 vertices.

### Cantitruncated cubic honeycomb

Cantitruncated cubic honeycomb
TypeUniform honeycomb
Schläfli symboltr{4,3,4} or t0,1,2{4,3,4}
tr{4,31,1}
Coxeter diagram
=
Vertex figure
(Sphenoid)
Coxeter group[4,3,4], ${\tilde {C}}_{3}$ Space group
Fibrifold notation
Pm3m (221)
4:2
Dualtriangular pyramidille
Cells:
Propertiesvertex-transitive

The cantitruncated cubic honeycomb or cantitruncated cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space, made up of truncated cuboctahedra, truncated octahedra, and cubes in a ratio of 1:1:3.

John Horton Conway calls this honeycomb a n-tCO-trille, and its dual triangular pyramidille.

#### Images

Four cells exist around each vertex:

#### Projections

The cantitruncated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

Cells can be shown in two different symmetries. The linear Coxeter diagram form can be drawn with one color for each cell type. The bifurcating diagram form can be drawn with two types (colors) of truncated cuboctahedron cells alternating.

Construction Cantitruncated cubic Omnitruncated alternate cubic
Coxeter group [4,3,4], ${\tilde {C}}_{3}$ =<[4,31,1]>
[4,31,1], ${\tilde {B}}_{3}$ Space groupPm3m (221)Fm3m (225)
Fibrifold4:22:2
Coloring
Coxeter diagram
Vertex figure
Vertex
figure
symmetry
[ ]
order 2
[ ]+
order 1

#### Triangular pyramidille

The dual of the cantitruncated cubic honeycomb is called a triangular pyramidille, with Coxeter diagram, . This honeycomb cells represents the fundamental domains of ${\tilde {B}}_{3}$ symmetry.

A cell can be as 1/24 of a translational cube with vertices positioned: taking two corner, ne face center, and the cube center. The edge colors and labels specify how many cells exist around the edge.

It is related to a skew apeirohedron with vertex configuration 4.4.6.6, with the octagons and some of the squares removed. It can be seen as constructed by augmenting truncated cuboctahedral cells, or by augmenting alternated truncated octahedra and cubes.

A double symmetry construction can be made by placing truncated octahedra on the truncated cuboctahedra, resulting in a nonuniform honeycomb with truncated octahedra, hexagonal prisms (as ditrigonal trapezoprisms), cubes (as square prisms), triangular prisms (as C2v-symmetric wedges), and tetrahedra (as tetragonal disphenoids). Its vertex figure is topologically equivalent to the octahedron.

### Alternated cantitruncated cubic honeycomb

Alternated cantitruncated cubic honeycomb
TypeConvex honeycomb
Schläfli symbolsr{4,3,4}
sr{4,31,1}
Coxeter diagrams
=
Cellssnub cube
icosahedron
tetrahedron
Vertex figure
Coxeter group[(4,3)+,4]
Dual
Cell:
Propertiesvertex-transitive

The alternated cantitruncated cubic honeycomb or snub rectified cubic honeycomb contains three types of cells: snub cubes, icosahedra (with Th symmetry), tetrahedra (as tetragonal disphenoids), and new tetrahedral cells created at the gaps.
Although it is not uniform, constructionally it can be given as Coxeter diagrams or .

Despite being non-uniform, there is a near-miss version with two edge lengths shown below, one of which is around 4.3% greater than the other. The snub cubes in this case are uniform, but the rest of the cells are not.

### Orthosnub cubic honeycomb

Orthosnub cubic honeycomb
TypeConvex honeycomb
Schläfli symbol2s0{4,3,4}
Coxeter diagrams
Cellsrhombicuboctahedron
icosahedron
triangular prism
Vertex figure
Coxeter group[4+,3,4]
DualCell:
Propertiesvertex-transitive

The orthosnub cubic honeycomb is constructed by snubbing the truncated octahedra in a way that leaves only rectangles from the cubes (square prisms). It is not uniform but it can be represented as Coxeter diagram . It has rhombicuboctahedra (with Th symmetry), icosahedra (with Th symmetry), and triangular prisms (as C2v-symmetry wedges) filling the gaps.

A double symmetry construction can be made by placing icosahedra on the rhombicuboctahedra, resulting in a nonuniform honeycomb with icosahedra, octahedra (as triangular antiprisms), triangular prisms (as C2v-symmetric wedges), and square pyramids.

### Runcitruncated cubic honeycomb

Runcitruncated cubic honeycomb
TypeUniform honeycomb
Schläfli symbolt0,1,3{4,3,4}
Coxeter diagrams
Cellsrhombicuboctahedron
truncated cube
octagonal prism
cube
Vertex figure
(Trapezoidal pyramid)
Coxeter group[4,3,4], ${\tilde {C}}_{3}$ Space group
Fibrifold notation
Pm3m (221)
4:2
Dualsquare quarter pyramidille
Cell
Propertiesvertex-transitive

The runcitruncated cubic honeycomb or runcitruncated cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of rhombicuboctahedra, truncated cubes, octagonal prisms, and cubes in a ratio of 1:1:3:3.

Its name is derived from its Coxeter diagram, with three ringed nodes representing 3 active mirrors in the Wythoff construction from its relation to the regular cubic honeycomb.

John Horton Conway calls this honeycomb a 1-RCO-trille, and its dual square quarter pyramidille.

#### Projections

The runcitruncated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

Two related uniform skew apeirohedrons exists with the same vertex arrangement, seen as boundary cells from a subset of cells. One has triangles and squares, and the other triangles, squares, and octagons.

#### Square quarter pyramidille

The dual to the runcitruncated cubic honeycomb is called a square quarter pyramidille, with Coxeter diagram . Faces exist in 3 of 4 hyperplanes of the [4,3,4], ${\tilde {C}}_{3}$ Coxeter group.

Cells are irregular pyramids and can be seen as 1/24 of a cube, using one corner, one mid-edge point, two face centers, and the cube center.

A double symmetry construction can be made by placing rhombicuboctahedra on the truncated cubes, resulting in a nonuniform honeycomb with rhombicuboctahedra, octahedra (as triangular antiprisms), cubes (as square prisms), two kinds of triangular prisms (both C2v-symmetric wedges), and tetrahedra (as digonal disphenoids). Its vertex figure is topologically equivalent to the augmented triangular prism.

### Omnitruncated cubic honeycomb

Omnitruncated cubic honeycomb
TypeUniform honeycomb
Schläfli symbolt0,1,2,3{4,3,4}
Coxeter diagram
Vertex figure
Phyllic disphenoid
Space group
Fibrifold notation
Coxeter notation
Im3m (229)
8o:2
[[4,3,4]]
Coxeter group[4,3,4], ${\tilde {C}}_{3}$ Dualeighth pyramidille
Cell
Propertiesvertex-transitive

The omnitruncated cubic honeycomb or omnitruncated cubic cellulation is a uniform space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of truncated cuboctahedra and octagonal prisms in a ratio of 1:3.

John Horton Conway calls this honeycomb a b-tCO-trille, and its dual eighth pyramidille.

#### Projections

The omnitruncated cubic honeycomb can be orthogonally projected into the euclidean plane with various symmetry arrangements.

Orthogonal projections
Symmetry p6m (*632) p4m (*442) pmm (*2222)
Solid
Frame

#### Symmetry

Cells can be shown in two different symmetries. The Coxeter diagram form has two colors of truncated cuboctahedra and octagonal prisms. The symmetry can be doubled by relating the first and last branches of the Coxeter diagram, which can be shown with one color for all the truncated cuboctahedral and octagonal prism cells.

Two uniform colorings
Symmetry ${\tilde {C}}_{3}$ , [4,3,4] ${\tilde {C}}_{3}$ ×2, [[4,3,4]]
Space groupPm3m (221)Im3m (229)
Fibrifold4:28o:2
Coloring
Coxeter diagram
Vertex figure

Two related uniform skew apeirohedron exist with the same vertex arrangement. The first has octagons removed, and vertex configuration 4.4.4.6. It can be seen as truncated cuboctahedra and octagonal prisms augmented together. The second can be seen as augmented octagonal prisms, vertex configuration 4.8.4.8.

4.4.4.6
4.8.4.8

Nonuniform variants with [4,3,4] symmetry and two types of truncated cuboctahedra can be doubled by placing the two types of truncated cuboctahedra on each other to produce a nonuniform honeycomb with truncated cuboctahedra, octagonal prisms, hexagonal prisms (as ditrigonal trapezoprisms), and two kinds of cubes (as rectangular trapezoprisms and their C2v-symmetric variants). Its vertex figure is an irregular triangular bipyramid.

This honeycomb can then be alternated to produce another nonuniform honeycomb with snub cubes, square antiprisms, octahedra (as triangular antiprisms), and three kinds of tetrahedra (as tetragonal disphenoids, phyllic disphenoids, and irregular tetrahedra).

### Alternated omnitruncated cubic honeycomb

Alternated omnitruncated cubic honeycomb
TypeConvex honeycomb
Schläfli symbolht0,1,2,3{4,3,4}
Coxeter diagram
Cellssnub cube
square antiprism
tetrahedron
Vertex figure
Symmetry[[4,3,4]]+
DualDual alternated omnitruncated cubic honeycomb
Propertiesvertex-transitive

An alternated omnitruncated cubic honeycomb or omnisnub cubic honeycomb can be constructed by alternation of the omnitruncated cubic honeycomb, although it can not be made uniform, but it can be given Coxeter diagram: and has symmetry [[4,3,4]]+. It makes snub cubes from the truncated cuboctahedra, square antiprisms from the octagonal prisms and with new tetrahedral cells created in the gaps.

#### Dual alternated omnitruncated cubic honeycomb

Dual alternated omnitruncated cubic honeycomb
TypeDual alternated uniform honeycomb
Schläfli symboldht0,1,2,3{4,3,4}
Coxeter diagram
Cell
Vertex figurespentagonal icositetrahedron
tetragonal trapezohedron
tetrahedron
Symmetry[[4,3,4]]+
DualAlternated omnitruncated cubic honeycomb
PropertiesCell-transitive

A dual alternated omnitruncated cubic honeycomb is a space-filling honeycomb constructed as the dual of the alternated omnitruncated cubic honeycomb.

24 cells fit around a vertex, making a chiral octahedral symmetry that can be stacked in all 3-dimensions:

Individual cells have 2-fold rotational symmetry. In 2D orthogonal projection, this looks like a mirror symmetry.

 Net

### Bialternatosnub cubic honeycomb

Bialternatosnub cubic honeycomb
TypeConvex honeycomb
Schläfli symbolsr3{4,3,4}
Coxeter diagrams
Cellsrhombicuboctahedron
snub cube
cube
triangular prism
Vertex figure
Coxeter group[4,3+,4]
DualCell:
Propertiesvertex-transitive

The bialternatosnub cubic honeycomb or runcic cantitruncated cubic honeycomb or runcic cantitruncated cubic cellulation is constructed by removing alternating long rectangles from the octagons and is not uniform, but it can be represented as Coxeter diagram . It has rhombicuboctahedra (with Th symmetry), snub cubes, two kinds of cubes: square prisms and rectangular trapezoprisms (topologically equivalent to a cube but with D2d symmetry), and triangular prisms (as C2v-symmetry wedges) filling the gaps.

### Biorthosnub cubic honeycomb

Biorthosnub cubic honeycomb
TypeConvex honeycomb
Schläfli symbol2s0,3{4,3,4}
Coxeter diagrams
Cellsrhombicuboctahedron
cube
Vertex figure
(Tetragonal antiwedge)
Coxeter group[[4,3<sup>+</sup>,4]]
DualCell:
Propertiesvertex-transitive

The biorthosnub cubic honeycomb is constructed by removing alternating long rectangles from the octagons orthogonally and is not uniform, but it can be represented as Coxeter diagram . It has rhombicuboctahedra (with Th symmetry) and two kinds of cubes: square prisms and rectangular trapezoprisms (topologically equivalent to a cube but with D2d symmetry).

### Truncated square prismatic honeycomb

Truncated square prismatic honeycomb
TypeUniform honeycomb
Schläfli symbolt{4,4}×{∞} or t0,1,3{4,4,2,∞}
tr{4,4}×{∞} or t0,1,2,3{4,4,∞}
Coxeter-Dynkin diagram
Coxeter group[4,4,2,∞]
DualTetrakis square prismatic tiling
Cell:
Propertiesvertex-transitive

The truncated square prismatic honeycomb or tomo-square prismatic cellulation is a space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of octagonal prisms and cubes in a ratio of 1:1.

It is constructed from a truncated square tiling extruded into prisms.

It is one of 28 convex uniform honeycombs.

### Snub square prismatic honeycomb

Snub square prismatic honeycomb
TypeUniform honeycomb
Schläfli symbols{4,4}×{∞}
sr{4,4}×{∞}
Coxeter-Dynkin diagram
Coxeter group[4+,4,2,∞]
[(4,4)+,2,∞]
DualCairo pentagonal prismatic honeycomb
Cell:
Propertiesvertex-transitive

The snub square prismatic honeycomb or simo-square prismatic cellulation is a space-filling tessellation (or honeycomb) in Euclidean 3-space. It is composed of cubes and triangular prisms in a ratio of 1:2.

It is constructed from a snub square tiling extruded into prisms.

It is one of 28 convex uniform honeycombs.

### Snub square antiprismatic honeycomb

Snub square antiprismatic honeycomb
TypeConvex honeycomb
Schläfli symbolht0,1,3{4,4,2,∞}
ht0,1,2,3{4,4,∞}
Coxeter-Dynkin diagram
Cellssquare antiprism
tetrahedron
Vertex figure
Symmetry[4,4,2,∞]+
Propertiesvertex-transitive

A snub square antiprismatic honeycomb can be constructed by alternation of the truncated square prismatic honeycomb, although it can not be made uniform, but it can be given Coxeter diagram: and has symmetry [4,4,2,∞]+. It makes square antiprisms from the octagonal prisms, tetrahedra (as tetragonal disphenoids) from the cubes, and two tetrahedra from the triangular bipyramids.

## See also

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