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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 (2022)



7. SULFATES
(Sulfates, Selenates, Tellurates, Chromates, Molybdates, Wolframates)


7.F: Chromates


7.FA. Without additional anions
 
7.FA.005. Tarapacaite
 
Tarapacáite K2(CrO4) orth., Pnam FOTO G


 
7.FA.010. Chromatite
 
Chromatite Ca(CrO4) tetr., I41/amd A


 
7.FA.015. Hashemite
 
Hashemite Ba(CrO4) orth., Pnma IMA 1978-006


 
7.FA.020. Crocoite
 
Crocoite Pb(CrO4) mon., P21/b FOTO G



 
 
7.FB. With additional O, S, Cl
 
7.FB.005. Phoenicochroite
 
Phoenicochroite Pb2O(CrO4) mon., C2/m FOTO A


 
7.FB.010. Santanaite
 
Santanait Pb11O12(CrO4) hex., P6322 IMA 1971-035


 
7.FB.015. Reynoldsite
 
Reynoldsite Pb2Mn4+2O5(CrO4) tric., P1 IMA 2011-051


 
7.FB.020. Georgerobinsonite
 
Georgerobinsonite Pb4(CrO4)2(OH)2FCl orth., Pmmn IMA 2009-068


 
7.FB.025. Dukeite
 
Dukeite Bi3+24O25(Cr6+O4)8(OH)6·3H2O trig., P31c IMA 1999-021


 
7.FB.030. Wattersite
 
Wattersite Hg1+4Hg2+O2(CrO4) mon., B2/b FOTO IMA 1987-030


 
7.FB.035. Deanesmithite
 
Deanesmithite Hg1+2Hg2+3S2O(CrO4) tric., P1 IMA 1991-001


 
7.FB.040. Edoylerite
 
Edoylerite Hg2+3S2(CrO4) mon., P21/c FOTO IMA 1987-008



 
 
7.FC. With SO4, PO4, AsO4, VO4, SiO4
 
7.FC.005. Evanichite
 
Evanichite Pb6Cr3+(CrO4)2(SO4)(OH)7FCl trig., P3 IMA 2022-033


 
7.FC.010. Vauquelinite
 
Vauquelinite CuPb2(CrO4)(PO4)(OH) mon., P21/n FOTO G


 
7.FC.015. Fornacite group
 
Fornacite CuPb2(CrO4)(AsO4)(OH) mon., P21/c G
Molybdofornacite CuPb2(MoO4)(AsO4)(OH) mon., P21/c IMA 1982-062


 
7.FC.020. Iranite group
 
Raygrantite ZnPb10(SO4)6(SiO4)2(OH)2 tric., P1 IMA 2013-001
Iranite ZnPb10(CrO4)6(SiO4)2(OH)2 tric., P1 A
Hemihedrite ZnPb10(CrO4)6(SiO4)2F2 tric., P1 IMA 1967-011


 
7.FC.025. Macquartite
 
Macquartite Cu2Pb7(CrO4)4(SiO4)2(OH)2 mon., C2/m IMA 1979-037


 
7.FC.030. Embreyite group
 
Embreyite Pb5(CrO4)2(PO4)2·H2O mon., A2/m FOTO IMA 1971-048
Cassedanneite Pb5(CrO4)2(VO4)2·H2O mon., A2/m IMA 1984-063



 
 
7.FD. Dichromates
 
7.FD.005. Lópezite
 
Lópezite K2Cr2O7 tric., P1 Rn



 
 

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

To distinguish from classical Strunz numbering, on hierarchical "group" level, a numbering with 3 digits is used, like "7.FA.005. Tarapacaite", instead of 2 digits (like "7.FA.05.") in the Strunz system.


© Thomas Witzke (2022)


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