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MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE based on E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001), revised by Thomas Witzke (2023) 2. SULFIDES and SULFOSALTS (Sulfides, Selenides, Tellurides, Arsenides, Antimonides, Bismuthides, Sulfarsenites, Sulfantimonites, Sulfbismuthites, etc.) 2.O: Sulfides etc. with Halides | ||||||||||||||||||
2.OA. Sulfides with Cl, Br, I (Halide-Sulfide) | ||||||||||||||||||
2.OA.005. Corderoite | ||||||||||||||||||
Corderoite | Hg3S2Cl2 | cub., I213 | FOTO | IMA 1973-037 | ||||||||||||||
2.OA.010. Lavrentievite | ||||||||||||||||||
Lavrentievite | Hg3S2(Cl,Br)2 | mon., P2/m (?) | IMA 1984-020 | |||||||||||||||
Arzakite, Hg3S2(Br,Cl)2, mon., P2/m (?), described without IMA approval. | ||||||||||||||||||
2.OA.015. Kenhsuite | ||||||||||||||||||
Kenhsuite | Hg3S2Cl2 | orth., A2mm | IMA 1996-026 | |||||||||||||||
2.OA.020. Grechishchevite | ||||||||||||||||||
Grechishchevite | Hg3S2(Br,Cl,I)2 | tetr., P4/mmm | IMA 1988-027 | |||||||||||||||
2.OA.025. Radtkeite | ||||||||||||||||||
Radtkeite | Hg3S2ClI | orth., Fmmm (?) | IMA 1989-030 | |||||||||||||||
2.OA.030. Capgaronnite | ||||||||||||||||||
Capgaronnite | HgAgS(Cl,Br) | orth., P21212 | FOTO | IMA 1990-011 | ||||||||||||||
2.OA.035. Iltisite | ||||||||||||||||||
Iltisite | HgAgS(Cl,Br) | hex. | FOTO | IMA 1994-031 | ||||||||||||||
2.OA.040. Hanauerite | ||||||||||||||||||
Hanauerite | HgAgSI | orth., Pmma | IMA 2018-045 | |||||||||||||||
2.OA.045. Perroudite | ||||||||||||||||||
Perroudite | Hg5Ag4S5(I,Br)2Cl2 | orth., P21212 | FOTO | IMA 1986-035 | ||||||||||||||
2.OA.050. Demicheleite group | ||||||||||||||||||
Demicheleite-(Cl) | BiSCl | orth., Pnma | IMA 2008-020 | |||||||||||||||
Demicheleite-(Br) | BiSBr | orth., Pnma | IMA 2007-022 | |||||||||||||||
Demicheleite-(I) | BiSI | orth., Pnma | IMA 2009-049 | |||||||||||||||
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2.OB. Tellurides with Cl, Br, I (Halide-Tellurides) | ||||||||||||||||||
2.OB.005. Kolarite | ||||||||||||||||||
Kolarite | PbTeCl2 | orth., Pmmm (?) | IMA 1983-081 | |||||||||||||||
The crystal structures of kolarite and radhakrishnaite are not known, their classification is therefore problematic. In Strunz 9 they were placed in the order 3.AA. Simple Halides without water, but from the atomic ratios it is obvious that they does not fit into a simple cation-anion scheme. Both minerals are grouped therefore here tentatively as Telluride-Chlorides in the Sulfide (etc.)-Halide subclass. | ||||||||||||||||||
2.OB.010. Radhakrishnaite | ||||||||||||||||||
Radhakrishnaite | PbTe3Cl2 | tetr. | FOTO | IMA 1983-082 | ||||||||||||||
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 Sulfide etc. subclass "2.O: Sulfides with Halides" into 2.OA Sulfides with Cl, Br, I (Halide-Sulfide); 2.OB Tellurides with Cl, Br, I (Halide-Tellurides). Further classification:
To distinguish from classical Strunz numbering, on hierarchical "group" level, a numbering with 3 digits is used, like "2.OA.005. Corderoite", instead of 2 digits (like "2.OA.05.") in the Strunz system. © Thomas Witzke (2023) |
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