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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 (2024)



2. SULFIDES and SULFOSALTS
(Sulfides, Selenides, Tellurides, Arsenides, Antimonides, Bismuthides, Sulfarsenites, Sulfantimonites, Sulfbismuthites, etc.)


2.D: Metalsulfides, M: S = 3: 4 and 2 : 3


2.DA. Metalsulfides with M : S = 3 : 4 (and similar)
 
2.DA.005. Thiospinel group [Spinel supergroup]
 
     005 a. Carrollite subgroup (A1+B3.5+2X4)
Carrollite CuCo2S4 cub., Fd3m FOTO G
Fletcherite CuNi2S4 cub., Fd3m FOTO IMA 1976-044
Cuprokalininite Cu(Cr3+Cr4+)S4 cub., Fd3m IMA 2010-008
Florensovite Cu(Cr3+1.5Sb5+0.5)S4 cub., Fd3m IMA 1987-012
Cuproiridsite Cu(Ir3+Ir4+)S4 cub., Fd3m FOTO IMA 1984-016
Malanite Cu(Ir3+Pt4+)S4 cub., Fd3m FOTO IMA 1995-003
Ezochiite Cu(Rh3+Pt4+)S4 cub., Fd3m IMA 2022-101
Shiranuiite Cu(Rh3+Rh4+)S4 cub., Fd3m IMA 2023-072
Rhodostannite Cu(Fe2+0.5Sn4+1.5)S4 tetr., I41/a IMA 1968-018
Toyohaite Ag(Fe2+0.5Sn4+1.5)S4 tetr., I41/a IMA 1989-007
 
     005 b. Linnaeite subgroup (A2+B3+2X4)
Joegoldsteinite MnCr2S4 cub., Fd3m IMA 2015-049
Daubréelite FeCr2S4 cub., Fd3m FOTO G
Kalininite ZnCr2S4 cub., Fd3m IMA 1984-028
Greigite FeFe2S4 cub., Fd3m FOTO IMA 1963-007
Linnaeite CoCo2S4 cub., Fd3m G
Grimmit NiCo2S4 cub., Fd3m IMA 2020-060
Violarite FeNi2S4 cub., Fd3m G
Siegenite CoNi2S4 cub., Fd3m FOTO G
Polydymite NiNi2S4 cub., Fd3m FOTO G
Indite FeIn2S4 cub., Fd3m A
Cadmoindite CdIn2S4 cub., Fd3m IMA 2003-042
Cuprorhodsite (Cu1+0.5Fe3+0.5)Rh2S4 cub., Fd3m IMA 1984-017, Rd
Xingzhongite PbIr2S4 cub., Fd3m (?) Q

Ferrorhodsite, (Fe,Cu)(Rh,Ir,Pt)2S4, IMA 1996-047, was found to be identical with Cuprorhodsite and was discredited (IMA 2017-H).


 
2.DA.010. Selenospinel group [Spinel supergroup]
 
     010 a. Tyrrellite subgroup (A1+B3.5+2X4)
Tyrrellite Cu(Co,Ni)2Se4 cub., Fd3m G
Nickeltyrrellite CuNi2Se4 cub., Fd3m IMA 2018-110
 
     010 b. Bornhardtite subgroup (A2+B3+2X4)
Bornhardtite CoCo2Se4 cub., Fd3m G
Trüstedtite NiNi2Se4 cub., Fd3m A


 
2.DA.015. Brezinaite group
 
Brezinaite Cr3S4 mon., C2/m IMA 1969-004
Zolenskyite FeCr2S4 mon., C2/m IMA 2020-070
Heideite (Fe,Cr)1+x(Ti,Fe)2S4 mon., I2/m IMA 1973-062
Wilkmanite Ni3Se4 mon., I2/m A


 
2.DA.020. Ferrodimolybdenite
 
Ferrodimolybdenite FeMo2S4 mon., C2/c IMA 2023-019


 
2.DA.025. Konderite group
 
Konderite PbCu3(Rh,Pt,Ir)8S16 hex., P6/mmm IMA 1983-053
Inaglyite PbCu3(Ir,Pt)8S16 hex., P6/mmm IMA 1983-054


 
2.DA.030. Kingstonite group
 
Kingstonite Rh3S4 mon., C2/m IMA 1993-046
Zaykovite Rh3Se4 mon., C2/m IMA 2019-084


 
2.DA.035. Mitrofanovite
 
Mitrofanovite Pt3Te4 trig., R3m IMA 2017-112


 
2.DA.040. Ruizhongite
 
Ruizhongite (Ag2□)Pb3Ge2S8 cub., I43d IMA 2022-066


 
2.DA.045. Murchisite
 
Murchisite Cr5S6 trig., P31c IMA 2010-003



 
 
2.DB. Metalsulfides with M : S = 2 : 3 (and similar)
 
2.DB.005. Stibnite group
 
     005 a. Stibnite series
Stibnite  /  Antimonit Sb2S3 orth., Pbnm FOTO G
Antimonselite Sb2Se3 orth., Pbnm IMA 1992-003
Bismuthinite Bi2S3 orth., Pbnm G
Guanajuatite Bi2Se3 orth., Pbnm G
 
     005 b. Pääkkönenite
Pääkkönenite Sb2AsS2 mon., C2/m IMA 1980-063
 
     005 c. Metastibnite
Metastibnite Sb2S3 amorphous FOTO G


 
2.DB.010. Ottemannite group
 
Ottemannite Sn2S3 orth., Pnam A
Suredaite PbSnS3 orth., Pnam IMA 1997-043


 
2.DB.015. Stangersite
 
Stangersit SnGeS3 mon., P21/c FOTO IMA 2019-092


 
2.DB.020. Bowieite group
 
Bowieite (Rh,Ir)2S2 orth., Pbcn IMA 1980-022
Kashinite (Ir,Rh)2S3 orth., Pbcn IMA 1982-036


 
2.DB.025. Edgarite
 
Edgarite FeNb3S6 hex., P63 FOTO IMA 1995-017

Structure analysis showed FeNb3+2Nb4+S6 and space group P63 (Bindi & Martin, 2018, Can. Min. 56, 259-264).


 
2.DB.030. Tarkianite
 
Tarkianite (Cu,Fe)(Re,Mo)4S8 cub., F43m IMA 2003-004


 
2.DB.035. Cameronite
 
Cameronite Cu7AgTe10 tetr. IMA 1984-069


 
2.DB.040. Montbrayite
 
Montbrayite (Au,Ag,Sb,Bi,Pb)23(Te,Sb,Bi,Pb)38 tric., P1 G, Rd IMA 17-F

Montbrayite: Structure analysis with new formula (Bindi et al. 2018, Can. Min. 56, 129-142).



 
 
2.DC. M : S variable
 
2.DC.005. Tetradymite group
 
     005 a. Hedleyite series, c ca. 3 x 6 Å
Zipserite Bi5S4 trig., P3m1 IMA 2022-75
Hedleyite Bi7Te3 trig., P3m1 G
 
     005 b. Ingodite series, c ca. 4 x 6 Å
Ingodite Bi2TeS trig. IMA 1980-045
Tsumoite BiTe trig., P3m1 IMA 1972-010a
Sulphotsumoite Bi2Te2S trig., P3m1 IMA 1980-084
Nevskite BiSe trig., P3m1 IMA 1983-026
Telluronevskite Bi3Te(Se,S)2 trig., P3m1 FOTO IMA 1993-027a
 
     005 c. Tetradymite series, c ca. 5 x 6 Å
Tellurantimony Sb2Te3 trig., R3m IMA 1972-002
Paraguanajuatite Bi2(Se,S)3 trig., R3m G
Tetradymite Bi2Te2S trig., R3m FOTO G
Tellurobismuthite Bi2Te3 trig., R3m G
Kawazulite Bi2Te2S trig., R3m (?) IMA 1968-014
Skippenite Bi2Se2Te trig., R3m IMA 1986-033
Hitachiite Pb5Bi2Te2S6 trig., P3m1 IMA 2018-027
 
     005 d. Pilsenite series, c ca. 7 x 6 Å
Ikunolite Bi4SeS2 trig., R3m FOTO A
Joséite-A Bi4TeS2 trig., R3m Q
Joséite-B Bi4Te2S trig., R3m Q
Pilsenite Bi4Te3 trig., R3m Rd
Laitakarite Bi4Se2S trig., R3m A
 
     005 e. Baksanite series, c > 9 x 6 Å
Baksanite Bi6Te2S3 trig., P3m1 IMA 1992-042
Ehrigite Bi8Te3 trig., R3m IMA 2023-074
Vihorlatite Bi24Se17Te4 trig., P3m1 FOTO IMA 1988-047

There is probably a complete solid solution from tellurian ikunolite to sulfurian pilsenite. Ordering of S and Te in joséite-A and joséite-B was not observed, they representing probably not separate mineral species.






 
 

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.D: Metalsulfides, M : S = 3 : 4 and 2 : 3" is based first mainly on the M : S ratio. The subdivision into 2.DA Metalsulfides with M : S = 3 : 4; 2.DB Metalsulfides with M : S = 2 : 3; 2.DC M : S = variable from Strunz 9 is retained.

Further classification:
2.DA. Metalsulfides with M : S = 3 : 4 (and similar): Spinel structures; other structures with M : S = 3 : 4; sulfides with similar ratios.
2.DB. Metalsulfides with M : S = 2 : 3: Chemical grouping with Sb and Bi sulfides with M : S = 2 : 3; Sn and Ge sulfides with M : S = 2 : 3; PGE and Au sulfides with M : S = 2 : 3; sulfides with similar ratios.
2.DC. Metalsulfides with M : S = variable: Tetradymite group with variable M : S ratio.


To distinguish from classical Strunz numbering, on hierarchical "group" level, a numbering with 3 digits is used, like "2.DA.005. Thiospinel group", instead of 2 digits (like "2.DA.05.") in the Strunz system.


© Thomas Witzke (2024)


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