Site Map Polytopes Dynkin Diagrams Vertex Figures, etc. Incidence Matrices Index

Ridge-facetings of the small ditrigonal icosidodecahedron ship   (part 1)

Possible facets here are the 12 pentagrams and 20 triangles of the comodore itself together with the 30 internal squares and 12 internal pentagons. The general naming code here is accordingly sidtid-#{5/2}-#{3}-#{4}-#{5}. This gives rise for exactly 161 (pure polyhedral) edge-facetings with n-gonal axial rotation symmetries, provided n > 2 (plus uncounted compounds). In fact, 3 polyhedral ones have full icosahedral symmetry, 46 have 5-fold pyramidal symmetry, 7 have 5-fold antiprismatic symmetry, 1 has cubical symmetry, 1 has chiral tetrahedral symmetry, 76 have 3-fold (full) pyramidal symmetry, 15 have 3-fold chiral pyramidal symmetry, 6 have 3-fold (full) antiprismatic symmetry, and 6 have 3-fold chiral antiprismatic symmetry. Only the full symmetrical compound rhom is being displayed additionally, as this one shows clearly the origin of the possible square facets.

Due to its amount this page is being split into parts. The following parts are available:

  1. part (this page) : full icosahedral and 5-fold pyramidal symmetry
  2. part : 5-fold pyramidal (continued) and 5-fold antiprismatic symmetry
  3. part : 5-fold antiprismatic (continued), cubic, chiral-tetrahedral, and 3-fold pyramidal symmetry
  4. part : 3-fold pyramidal (continued) symmetry
  5. part : 3-fold pyramidal (continued) symmetry
  6. part : 3-fold chiral pyramidal, 3-fold antiprismatic, and 3-fold chiral antiprismatic symmetry

sidtid-12-20-0-0
= sidtid
sidtid-12-0-0-12
= ditdid
sidtid-0-20-0-12
= gidtid
sidtid-0-0-30-0
= rhom
sidtid-0-5-5-1
= rapescu
sidtid-0-5-25-1 sidtid-0-5-15-5-a sidtid-0-5-15-5-b sidtid-0-10-10-6-a
icosahedral 5-fold pyramidal ...
sidtid-0-10-10-6-b sidtid-0-15-5-11 sidtid-1-0-10-5 sidtid-1-0-20-5 sidtid-1-5-5-0
= stiscu
sidtid-1-5-5-6 sidtid-1-5-15-6 sidtid-1-5-25-0 sidtid-1-10-10-5
... 5-fold pyramidal ...
sidtid-1-10-20-1-a sidtid-1-10-20-1-b sidtid-1-15-15-2 sidtid-1-15-5-6 sidtid-2-5-5-5 sidtid-2-10-0-6 sidtid-2-15-15-1 sidtid-5-0-10-1 sidtid-5-0-20-1
... 5-fold pyramidal ...
continue >>

© 2004-2019
top of page