Aktashite

Aktashite is a rare arsenic sulfosalt mineral with formula Cu₆Hg₃As₄S₁₂. It is a copper mercury-bearing sulfosalt and is the only sulfosalt mineral with essential Cu and Hg yet known. It is of hydrothermal origin. It was published without approval of the IMA-CNMNC, but recognized as valid species by the IMA-CNMNC Sulfosalts Subcommittee (2008).^{[2][3][4][5][6]}

Aktashite
Gray aktashite is richly dispersed on matrix
General
Category	Sulfosalt
Formula	Cu6Hg3As4S12
IMA symbol	Ats[1]
Strunz classification	2.GA.30
Crystal system	Trigonal
Crystal class	Pyramidal (3) H-M symbol: (3)
Space group	R3
Identification
Formula mass	1667.51 g/mol
References	[2][3]