AM_Grechishchevite Formula: Hg6 S4 Br2 Cl I Name: Grechishchevite Unit cell: 13.249 13.259 8.71 90.0 90.0 90.0 , V=1530.07 Space group: PBNM (62)

Pervukhina N V , Vasil ev V I , Borisov S V , Magarill S A , Naumov D Y , The Canadian Mineralogist , 41 (2003) p.1445-1453, The crystal structure of a polymorph of Hg3S2Br1Cl.5I.5, Locality: synthetic