1. This uniform polyhedron compound is a composition of 2 icosahedra . 2. The truncated 600-cell consists of 600 icosahedra . 3. The centers of the icosahedra are located at the fcc positions of the lattice. 4. From the remaining 53 boron sites, 48 form icosahedra and 5 are bridging sites. 5. Its facets are hemi-icosahedra . 6. The truncated octahedral cells become icosahedra . 7. Then the four side-facets of the prism, the triangular prisms become tridiminished icosahedra . 8. They have elongated, geminate capsids with two incomplete T = 1 icosahedra joined at the missing vertex. 9. The 1938 book on the fifty-nine icosahedra resulted, written by Coxeter and Patrick du Val. 10. If the twinned icosahedra were independent without twinning then B23 would be a bridge site linking three icosahedra.
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