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Elongated hexagonal bipyramid : ウィキペディア英語版 | Elongated hexagonal bipyramid
In geometry, the elongated hexagonal bipyramid is constructed by elongating a hexagonal bipyramid (by inserting a hexagonal prism between its congruent halves). == Related polyhedra==
This polyhedron is in the family of elongated bipyramids, of which the first three can be Johnson solids: J14, J15 and J16. The hexagonal form can be constructed by all regular faces, but isn't a ''Johnson solid'' because 6 equilateral triangles would form six co-planar faces (in a regular hexagon).
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