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octahedral
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- Octahedral - a. - Having eight faces or sides; of, pertaining to, or formed in, octahedrons; as, octahedral cleavage.
- Octahedral - a. - Having eight faces or sides; of, pertaining to, or formed in, octahedrons; as, octahedral cleavage.
- Perofskite - n. - A titanate of lime occurring in octahedral or cubic crystals.
- Fluorite - n. - Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.
- Cubo-octahedron - n. - A combination of a cube and octahedron, esp. one in which the octahedral faces meet at the middle of the cubic edges.
- Ralstonite - n. - A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.
- Danalite - n. - A mineral occuring in octahedral crystals, also massive, of a reddish color. It is a silicate of iron, zinc manganese, and glucinum, containing sulphur.