6-demicubic honeycomb

6-demicubic honeycomb
6-demicubic honeycomb
(No image)
Type Uniform honeycomb
Family Alternated hypercube honeycomb
Schläfli symbol h{4,3,3,3,3,4}
Coxeter-Dynkin diagram CDel node h.pngCDel 4.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel 4.pngCDel node.png
CDel nodes 10ru.pngCDel split2.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel 4.pngCDel node.png
CDel nodes 10ru.pngCDel split2.pngCDel node.pngCDel 3.pngCDel node.pngCDel 3.pngCDel node.pngCDel split1.pngCDel nodes.png
Facets {3,3,3,3,4} 6-cube t5.svg
h{4,3,3,3,3} 6-demicube t0 D6.svg
Vertex figure t1{3,3,3,3,4}
Rectified hexacross.svg
Coxeter group {\tilde{B}}_6 [4,3,3,3,31,1]
{\tilde{D}}_6 [31,1,3,3,31,1]

The 6-demicubic honeycomb or demihexeractic honeycube is a uniform space-filling tessellation (or honeycomb) in Euclidean 6-space. It is constructed as an alternation of the regular 6-cube honeycomb.

It is composed of two different types of facets. The 6-cubes become alternated into 6-demicubes h{4,3,3,3,3} and the alternated vertices create 6-orthoplex {3,3,3,3,4} facets.

Its vertex arrangement is called the D6 lattice.[1]

Contents

Kissing number

This tessellation represents a dense sphere packing (With a Kissing number of 60, compared to the best known of 72), with each vertex of this polytope represents the center point for one of the 60 5-spheres, and the central radius, equal to the edge length exactly fits one more 5-sphere.

See also

Notes

External links

  • Olshevsky, George, Half measure polytope at Glossary for Hyperspace.
  • Kaleidoscopes: Selected Writings of H.S.M. Coxeter, edited by F. Arthur Sherk, Peter McMullen, Anthony C. Thompson, Asia Ivic Weiss, Wiley-Interscience Publication, 1995, ISBN 978-0-471-01003-6 [1]
    • (Paper 24) H.S.M. Coxeter, Regular and Semi-Regular Polytopes III, [Math. Zeit. 200 (1988) 3-45]