tetrakis hexahedra

Noun

tetrakis hexahedron (plural tetrakis hexahedra or tetrakis hexahedrons)

1. A Catalan solid that has 24 congruent triangular faces and 36 edges and can be imagined as a cube with a square pyramid on each face.
   • Of the fourteen crystals examined, five were from the Karnul district (four tetrakis-hexahedra and one octahedron with tetrakis-hexahedron), one from Sambalpur (tetrakis-hexahedron with octahedron, four from Panna (much distorted tetrakis-hexahedra), the remaining four said to have come from Simla.1904, Max Bauer, translated by L. J. Spencer, Precious Stones, volume 1, published 1968, page 154

   Synonyms:

   dysdakis hexahedron, hextetrahedron, hexatetrahedron, kiscube, tetrahexahedron