Densest lattice packing of rhombicosidodecahedron

The rhombicosidodecahdron (sometimes called small rhombicosidodecahedron) has 60 vertices, 120 edges and 62 facets, 12 pentagons, 30 squares and 20 triangles. It is one of the thirteen Archimedean solids and its dual is called deltoidal hexecontahedron. Maybe the first drawing of the rhombicosidodecahedron can be found in Daniele Barbaro's book La Practica della Perspectiva (around 1569).

The density of a densest lattice packing was calculatd with the algorithm of Betke and Henk. The density is equal to 0.8047..., and the 12 points in the picture show the lattice points of a critical lattice lying in the boundary.

Model produced with: JavaView v2.00.a11

Keywords
| lattice packings; polytopes; packings; critical lattice; rhombicosidodecahedron | |

MSC-2000 Classification
| 52C17 (11H31) | |

Zentralblatt No.
| 01682998 |

- Ulrich Betke and Martin Henk:
*Densest lattice packings of 3-polytopes*, Comp. Geom.**16**, 3 (2000), 157 - 186.

- Master File: rhombicosidodecahedron_Master.jvx
- Applet File: rhombicosidodecahedron_Master.jvx
- Preview: rhombicosidodecahedron_Preview.gif

Gif-file was produced by Povray 3.02

Submitted: Thu Feb 1 16:41:52 CET 2001.

Accepted: Fri Apr 27 14:11:54 CET 2001.

University of Magdeburg

Department of Mathematics

Universitätsplatz 2

D-39106 Magdeburg

henk@mail.math.uni-magdeburg.de

http://www.math.uni-magdeburg.de/~henk