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Melanterite group
[ A
2+
][SO
4
],7H
2
O
[ Mg ]: Alpersite
[ Co ]:
Bieberite
[ Cu ]:
Boothite
[ Mn ]:
Mallardite
[ Fe ]:
Melanterite
[ Zn ]:
Zincmelanterite
Polymorph:
Epsomite group
(Orthorhombic)
Class:
Sulfate
System: Monoclinic