Heptagrammic crossed-antiprism

Heptagrammic crossed-antiprism
Type Uniform polyhedron
Faces 2 Heptagrams
14 triangles
Edges 28
Vertices 14
Vertex configuration 7/4.3.3.3
Wythoff symbol |2 2 7/4
Schläfli symbol sr{2,7/4}
Coxeter diagram
Symmetry group D7h
Dual polyhedron Heptagrammic concave deltohedron
Properties nonconvex
Vertex figure

In geometry, the heptagrammic crossed-antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two {7/3} heptagrams.

It differs from the heptagrammic antiprism (7/3) by having opposite orientations on the two heptagrams.


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