based on E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001),
revised by Thomas Witzke (2022)
1. ELEMENTS
(Metals and intermetallic alloys, Metalloids and Nonmetals, Hydrides, Borides, Carbides, Silicides, Nitrides, Phosphides, and Oxy-Titanides)
1.D: Nonmetalcarbides and -nitrides
Moissanite polytypes: Moissanite-6H, hex., P63mc, common polytype; also known are Moissanite-3C, cub., F43m; Moissanite-2H, hex., P63mc; Moissanite-4H, hex., P63mc; Moissanite-5H, hex., P63mc; Moissanite-15R, trig., R3m; Moissanite-3R, trig.
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G = Grandfathered minerals: original description preceded the establishment of the CNMNC in 1959, and generally regarded as a valid species
A or IMA No. = Minerals approved by the CNMNC
Rd = Redefinition of the mineral approved by the CNMNC
Rn = Renamed with approval by the CNMNC
Q = Questionable mineral
Classification principles:
Subdivision of the Elements subclass "1.D: Nonmetalcarbides and -nitrides" is based first mainly on chemical principles, according to the order of the elements in groups (columns) in the periodic table: Carbon group (C), Nitrogen group (N).
Further classification:
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1.DA. Nonmetal carbides: 1.DB. Nonmetal nitrides: Nitrides; Oxy-Nitrides |
To distinguish from classical Strunz numbering, on hierarchical "group" level, a numbering with 3 digits is used, like "1.DA.005. Moissanite", instead of 2 digits (like "1.DA.05.") in the Strunz system.
© Thomas Witzke (2023)
