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MINERAL CLASSIFICATION / SYSTEMATIK der MINERALE
according to E.H. Nickel & M.C. Nichols (2009), H. Strunz & E.H. Nickel (2001)
7. SULFATES
(Sulfates, Selenates, Tellurates, Chromates, Molybdates, Wolframates)
7.A: Sulfates etc. without additional anions, without water
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7.AA. With small cations |
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7.AA.05. Group reserved
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7.AB. With medium-sized cations |
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7.AB.05. Millosevichite group |
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Millosevichite | |
Al2(SO4)3 | |
trig., R-3 | |
FOTO | |
| | G |
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Mikasaite | |
Fe2(SO4)3 | |
trig., R-3 | | | | | | IMA 1992-015 |
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7.AB.10. Chalcocyanite group |
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Chalcocyanite | |
Cu(SO4) | |
orth., Pnma | |
FOTO |
| | | G |
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Zinkosite | |
Zn(SO4) | |
orth., Pnma | | | | | | G |
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Ferrotellurite | |
Fe-Tellurate (?) | |
(?) | | | | | | Q |
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Zinkosite is probably an artificial product, the natural occurrence is doubtful.
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7.AC. With medium-sized and large cations |
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7.AC.05. Vanthoffite group |
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Vanthoffite | |
Na6Mg(SO4)4 | |
mon., P21/c | |
FOTO | |
ENTDECKUNG | | G |
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7.AC.10. Langbeinite group |
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Langbeinite | |
K2Mg2(SO4)3 | |
cub., P213 | |
FOTO | |
ENTDECKUNG | | G |
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Manganolangbeinite | |
K2Mn2(SO4)3 | |
cub., P213 | | | | | | G |
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Efremovite | |
(NH4)2Mg2(SO4)3 | |
cub., P213 | |
FOTO | | | | IMA 1987-033 |
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7.AC.15. Yavapaiite group |
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Eldfellite | |
NaFe(SO4)2 | |
mon., B2/m | | | | | | IMA 2007-051 |
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Yavapaiite | |
KFe(SO4)2 | |
mon., C2/m | | | | | | G |
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7.AC.20. Godovikovite group |
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Steklite | |
KAl(SO4)2 | |
trig., P321 | | | | | | IMA 2011-041 |
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Godovikovite | |
(NH4)Al(SO4)2 | |
trig., P321 | |
FOTO | | | | IMA 1987-019 |
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Sabieite | |
(NH4)Fe(SO4)2 | |
trig., P321 | | | | | | IMA 1982-088 |
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7.AC.25. Thenardite group |
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Thenardite | |
Na2(SO4) | |
orth., Fddd | |
FOTO | |
| | G |
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7.AC.30. Metathenardite group |
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Metathenardite | |
Na2(SO4) | |
trig., P-3m1 (?) | | | | | | H |
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An incompletely characterized high-temperature polymorph of thenardite from volcanic occurrences. Breaks down to polymorphs of thenardite upon cooling and standing.
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7.AC.35. Aphthitalite group |
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Aphthitalite | |
K3Na(SO4)2 | |
trig., P-3m1 | | | | | | G |
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7.AC.40. Pyracmonite group |
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Pyracmonite | |
(NH4)3Fe(SO4)3 | |
trig., R3c | |
FOTO | |
| | IMA 2008-029 |
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7.AD. With only large cations |
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7.AD.05. Arcanite group |
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Arcanite | |
K2(SO4) | |
orth., Pmcn | | | | | | G |
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Mascagnite | |
(NH4)2(SO4) | |
orth., Pmcn | |
FOTO | |
| | G |
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7.AD.10. Mercallite group |
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Mercallite | |
K(HSO4) | |
orth., Pbca | | | | | | G |
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7.AD.15. Misenite group |
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Misenite | |
K8(HSO4)6(SO4) | |
mon. | | | | | | G |
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7.AD.45. Letovicite group |
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Letovicite | |
(NH4)3(HSO4)(SO4) | |
tric., P-1 | |
FOTO | |
| | G |
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7.AD.25. Glauberite group |
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Glauberite | |
CaNa2(SO4)2 | |
mon., C2/c | | | | | | G |
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7.AD.30. Anhydrite group |
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Anhydrite | |
Ca(SO4) | |
orth., Amma | |
FOTO | |
| | G |
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7.AD.35. Baryte group |
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Celestite / Coelestin | |
Sr(SO4) | |
orth., Pnma | |
FOTO | | | | A |
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Baryte | |
Ba(SO4) | |
orth., Pnma | |
FOTO | | | | A |
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Anglesite | |
Pb(SO4) | |
orth., Pnma | |
FOTO | | | | G |
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Olsacherite | |
Pb2(SO4)(SeO4) | |
orth., P2212 | | | | | | IMA 1969-009 |
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7.AD.40. Palmierite group |
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Kalistrontite | |
K2Sr(SO4)2 | |
trig., R-3m | | | | | | A |
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Palmierite | |
K2Pb(SO4)2 | |
trig., R-3m | | | | | | G |
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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)
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