The tetrahedrite subgroup includes:
tetrahedrite-(Cu):
Cu6(Cu4Cu2+2)Sb4S13
tetrahedrite-(Hg):
Cu6(Cu4Hg2)Sb4S13
tetrahedrite-(Ni):
Cu6(Cu4Ni2)Sb4S13
tetrahedrite-(Zn):
Cu6(Cu4Zn2)Sb4S13
The tetrahedrite subgroup is a member of the tetrahedrite group.
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