hexaoctahedron

hexaoctahedron (plural hexaoctahedra or hexaoctahedrons)

1. Alternative form of hexoctahedron
   • 1861, The Victorian Government Prize Essays, 1860, John Ferres, page 223:

     The writer has seen a remarkably fine specimen of alluvial (Ballaarat) gold, it was a group of inch and half-inch crystals of the hexaoctahedron crystallographic form, hollowing towards the centre of the faces stair fashion, parallel to the combination lines.

   • 1908, Henry Erni, Mineralogy Simplified. Easy Methods of Identifying Minerals, Including Ores, by Means of the Blow-Pipe, by Flame Reactions, by Humid Chemical Analysis, and by Physical Tests., page 385:

     Diamond, C. I. In octahedrons, hexaoctahedrons; cleavage octahedral.

   • 1952, George Mimms Rawlins, Chemistry in Action, page 257:

     The natural crystalline form of diamonds is a regular octahedron although a few have been found that were hexaoctahedrons. […] Hexaoctahedrons have forty-eight faces.

   • 1987, Progress in Basic Principles of Imaging Systems: Proceedings of the International Congress of Photographic Science, Köln (Cologne), 1986, page 59:

     The seven kinds consist of three unique forms which are the cube, octahedron, and rhombic dodecahedron, and four families of forms having the shape of icositetrahedra, trisoctahedra, tetrahexahedra, and hexaoctahedra.

   • 1994, Zdenka Náglová, transl., Minerals and Rocks, Magna Books, translation of original by Jiří Kouřimský, →ISBN, page 156:

     It usually forms rounded octahedra, often twinned, transparent, yellow, brown, green, less often blue and black; it rarely occurs in the form of hexaoctahedra.