Mineral Class 06: Sulfates, Chromates, Molybdate

Barite with red phantoms (colored by realgar) from Baia Sprie (Felsöbánya), Romania
Sulfates, Selenates, Tellurates, Chromates, Molybdates, Wolframates  This class represents great group of minerals with respective complexes: SO4, TeO4, CrO4, MoO4, WO4 tetrahedra. This class is classified into groups of hydrous and anhydrous minerals.