... overwhelmingly via the oxidation of sulfides and sulfosalts, it is surprising that very few of them contain sulfate. This no doubt reflects both solubility properties and relationships with other more stable phases. Known secondary Sb sulfate minerals are klebelsbergite, Sb 4 O 4 SO 4 (OH) 2 , peretaite, CaSb 4...

...Luca Bindi; Cristian Biagioni; Bruno Martini; Adrio Salvetti; Giovanni Dalla Fontana; Massimo Taronna; Marco E. Ciriotti Abstract The new mineral tavagnascoite, Bi 4 O 4 (SO 4 )(OH) 2 , was discovered in the Pb-Bi-Zn-As-Fe-Cu ore district of Tavagnasco, Turin, Piedmont, Italy. It occurs as blocky...

... stacked along b* and bonded through two Sb atoms and H bonds. The complex H bonding system in the structure is discussed. On the basis of information gained from this characterization, the crystal-chemical formula was revised according to the structural results, yielding Sb 6+ x O 8+ x (SO 4 )(OH) x ·(H 2...

... the expected [4] Se–O distance is about 1.63 Å. Heterovalent P 5+ ↔ S 6+ isomorphism has been observed in woodhouseite, Ca[Al 3 (OH) 6 ((S 0.5 P 0.5 )O 4 ) 2 ] ( Kato 1977 ) and svanbergite, Sr[Al 3 (OH) 6 ((S 0.5 P 0.5 )O 4 ) 2 ] ( Kato and Miura 1977 ). Cahill et al. (submitted) determined the structure...