Re-DETERMINATION OF the CRYSTAL STRUCTURE OF heyrovskyite MINERAL Pb<sub>6</sub>Bi<sub>2</sub>S<sub>9 </sub>(KUDRYAVYI volcano, ITURUP ISLAND, Kurils, RUSSIA)
Heyrovskyite mineral Pb6Bi2S9 from fumarole exhalations of the Kudryavyi volcano (Iturup island, Kurils, Russia) is studied by X-ray crystallography (Bruker Nonius X8 Apex with a 4K CCD detector, R = 0.0405). Unit cell parameters are: a = 4.1457(1) Å, b = 13.7421(5) Å, c = 31.5005(12) Å, V = 1794.6(1) Å3, Z = 4, dx = 7.216 g/cm3, Cmcm space group, R=0.0405. The resulted structure is similar to the known structures of heyrovskyites from other deposits with some variation in the cation composition.