hexaoctahedron

plural hexaoctahedra · plural hexaoctahedrons

1. alternativeAlternative form of hexoctahedron.

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

   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

   4 more examples

   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.

   1861, The Victorian Government Prize Essays, 1860, John Ferres, page 223

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

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

   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.

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

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

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