Swirlprismatodiminished rectified 600-cell (EntityTopic, 13)
From Hi.gher. Space
The swirlprismatodiminished rectified 600-cell is a CRF polychoron constructed from the rectified 600-cell by deleting 120 vertices corresponding with an inscribed 600-cell, or, equivalently, cutting off 12 rings of 10 pentagonal prism pyramids. Its cells are 600 square pyramids, 120 pentagonal prisms and 120 pentagonal antiprisms. It was discovered by George Olshevsky in 2000.
Projections
Showing its rings of alternating pentagonal prisms and antiprisms:
Showing 5 of its rings of square pyramids that exhibit the 3-fold twist characteristic of the Boerdijk-Coxeter helix:
