Galkhaite is a rare and chemically complex sulfosalt mineral from a group of natural thioarsenites. Its formula is , making the mineral the only known natural Cs-Hg and Cs-As phase. It occurs in Carlin-type hydrothermal deposits.

References

Sulfosalt minerals Caesium minerals Arsenic minerals Antimony minerals Thallium minerals Cubic minerals Minerals in space group 217 {{sulfide-mineral-stub