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Hoelzel Classification

7 SULFATES CHROMATES MOLYBDATES WOLFRAMATES

7.B Sulfates (+Anions -Water)

7.BB Alunite-Group (sulfatian)

7.BB.1 Alunites with alkalies, Ag, Tl

Natroalunite-1c Na2Al3(SO4)2(OH)6 trigonal R3m 3m 7.BB.100
Alunite KAl3(SO4)2(OH)6 trigonal R3m 3m 7.BB.110
Natrojarosite NaFe3+3(SO4)2(OH)6 trigonal R3m 3m 7.BB.140
Jarosite KFe3+3(SO4)2(OH)6 trigonal R3m 3m 7.BB.145
Argentojarosite AgFe3+3(SO4)2(OH)6 trigonal R3m 3m 7.BB.160
Dorallcharite (Tl,K)Fe3+3[(OH)6|(SO4)2] trigonal R3m 3m 7.BB.170

7.BB.2 Alunites with NH4+, H+, H3O+

Ammonioalunite NH4Al3(SO4)2(OH)6 trigonal R3m, R3m 3m, 3m 7.BB.200
Ammoniojarosite NH4Fe3+3(SO4)2(OH)6 trigonal R3m 3m 7.BB.220
Hydronium jarosite (H3O)Fe3+3(SO4)2(OH)6 trigonal R3m 3m 7.BB.230

7.BB.3 Alunites with Ca, Sr, Ba

Huangite Ca0.5Al3[(OH)6|(SO4)2] trigonal R3m 3m 7.BB.300
Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 trigonal R3m 3m 7.BB.330

7.BB.4 Alunites with Pb

Osarizawaite Pb(Al2Cu2+)(SO4)2(OH)6 trigonal R3m 3m 7.BB.400
Beaverite-(Cu) Pb(Fe3+2Cu)(SO4)2(OH)6 trigonal R3m 3m 7.BB.410
Beaverite-(Zn) Pb(Fe3+2Zn)(SO4)2(OH)6 trigonal R3m 3m 7.BB.415

7.BB.5 Alunites-2R

Natroalunite-2c NaAl3(SO4)2(OH)6 trigonal R3m 3m 7.BB.500
Walthierite Ba0.5Al3(SO4)2(OH)6 trigonal R3m 3m 7.BB.530
Plumbojarosite PbFe63+(SO4)4(OH)12 trigonal R3m 3m 7.BB.550

7.BB.7 Related to Alunites

Krivovichevite Pb3[Al(OH)6](SO4)(OH) trigonal R3c 3m 7.BB.700



Mineralsystematik-Übersicht