Betpakdalite-Caca

Availability

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Size

2.5 x 1.8 x 1.6 cm - Thumbnail 

Formula

MgCa₂Fe³⁺₃Mo₈(AsO₄)₂O₂₈(OH)·23H₂O (RRUFF)

Locality

Sadisdorf, Erzgebirge, Saxony, Germany

Tagged

arsenate

Yellow pulverulent coating of rare Betpakdalite with Molybdenite. There are purple flaky crystals, as shown in the last photo, which are unidentified. In-hand, under the scope, these are very hard to see. But the digital camera picks them up and, it becomes obvious to see. My only guess is that these are chromian clinochlore, but there are no reported chromium minerals at this locality.