according to E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001)

           under construction !!!!

(Sulfates, Selenates, Tellurates, Chromates, Molybdates, Wolframates)

7.F: Chromates

7.FA. Without additional anions
7.FA.05. Tarapacaite group
Tarapacáite K2(CrO4) orth., Pnam FOTO G

7.FA.10. Chromatite group
Chromatite Ca(CrO4) tetr., I41/amd A

7.FA.15. Hashemite group
Hashemite Ba(CrO4) orth., Pnma IMA 1978-006

7.FA.20. Crocoite group
Crocoite Pb(CrO4) mon., P21/b FOTO G

7.FB. With additional O, V, S, Cl
7.FB.05. Phoenicochroite group
Phoenicochroite Pb2O(CrO4) mon., C2/m FOTO A

7.FB.10. Santanaite group
Santanait Pb11O12(CrO4) hex., P6322 A

7.FB.15. Wattersite group
Wattersite Hg1+4Hg2+O2(CrO4) mon., B2/b IMA 1987-030

7.FB.20. Deanesmithite group
Deanesmithite Hg1+2Hg2+3S2O(CrO4) tric., P-1 IMA 1991-001

7.FB.25. Edoylerite group
Edoylerite Hg2+3S2(CrO4) mon., P21/c FOTOIMA 1987-008

7.FB.30. Georgerobinsonite group *
Georgerobinsonite * Pb4(CrO4)2(OH)2FCl orth., Pmmn IMA 2009-068

7.FC. With PO4, AsO4, VO4, SiO4
7.FC.05. Vauquelinite group
Vauquelinite CuPb2(CrO4)(PO4)(OH) mon., P21/n FOTOG
7.FC.10. Fornacite group
Fornacite CuPb2(CrO4)(AsO4)(OH) mon., P21/c G
Molybdofornacite CuPb2(MoO4)(AsO4)(OH) mon., P21/c IMA 1982-062
7.FC.15. Iranite group
Iranite ZnPb10(CrO4)6(SiO4)2(OH)2 tric., P1 (?) A
Hemihedrite ZnPb10(CrO4)6(SiO4)2F2 tric., P1 IMA 1967-011
7.FC.20. Embreyite group
Embreyite Pb5(CrO4)2(PO4)2 · H2O mon., A2/m (?) FOTOA
Cassedanneite Pb5(CrO4)2(VO4)2 · H2O mon., A2/m A

7.FD. Dichromates
7.FD.05. Lopezite group
Lópezite K2Cr2O7 A

in bold: grandfathered, IMA accepted, renamed and redefined (with IMA approval) minerals,
in normal letters: minerals published without IMA approval, questionable minerals, polytypes

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
GROUP = a name used to designate a group of species
N = Mineral published without approval of the CNMNC
Q = Questionable mineral
H = Hypothetical mineral (synthetic, anthropogenic, etc.)
D = Discredited by the CNMNC
Poly = Polytype

© Thomas Witzke / Stollentroll (2007-2012)