AM_Vurroite Formula: Pb9.6 Bi6.97 As4.71 Sn.72 S27 Cl3 Name: Vurroite Unit cell: 8.371 45.502 27.273 90.0 98.83 90.0 , V=10265.09 Space group: C12/C1 (15)

Pinto D , Bonaccorsi E , Balic-Zunic T , Makovicky E , American Mineralogist , 93 (2008) p.713-727, The crystal structure of vurroite, Pb20Sn2(Bi,As)22S54Cl6: OD-character,, polytypism, twinning, and modular description, Locality: Vulcano, Aeolian Islands, Italy