Arsenate, beudantite group
Colour: White to yellow or green
Solubility: Scarcely attacked by nitric or hydrochloric acid, dissolved by hot sulphuric acid (AM 47.415)
At the type locality, the Michael mine, Weiler, Seelbach, Seelbach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany, weilerite occurs as a white earthy crust, associated with adamite and mimetite, on chert and baryte (AM 47.415).
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