The crystal structure of vasilyevite, ideally (Hg22+10 O6 I3 Br2 Cl (CO3), triclinic, a 9.344(2), b 10.653(2), c 18.265(4) Å, α 93.262(5), β 90.548(4), Υy 115.422(4)°, V 1638.3(9) Å3, space group P1̄, Z = 2, D(calc) = 9.57 ...