21-8 gyrochoron

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21-8 gyrochoron
Rank4
TypeIsochoric
SpaceSpherical
Info
SymmetryI2(21)+×4×I, order 84
Elements
Vertex figurePhyllic disphenoid (two types)
Cells21
Faces21 rectangular-symmetric hexagons, 42 mirror-symmetric pentagons, 42 kites
Edges42+42+84
Vertices42+42
Central density1
Euler characteristic0
Related polytopes
Dual21-8 step prism
Properties
ConvexYes
OrientableYes
NatureTame

The 21-8 gyrochoron, also known as the triswirl 21, is a convex isochoric polychoron with 21 identical cells.

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