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      7th Class - 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.

baryt g1021	sádrovec g1634	baryt g3037	barzt na křemeni s galenitem g3966	baryt s whewellitem a sfaleritem g5477
baryt g6320	baryt g7512	baryt g8474	baryt g8951	baryt s ankeritem g9113
scheelit g9130	sádrovec g9162

In the Virtual Museum there are total 149 samples