Dussertite

arsenate

Djebel Debar

Formula: BaFe3+3(AsO4)(AsO3OH)(OH)6
Anhydrous arsenate containing hydroxyl, dussertite group, alunite supergroup
Specific gravity: 3.75
Hardness: 3½
Colour: Green, yellow-green, bluish green; yellowish green in transmitted light.
Solubility: Soluble in dilute hydrochloric acid
Dussertite is a secondary mineral, frequently an alteration product of arsenopyrite. At the type locality, Djebel Debar, Algeria, it is found as crusts on tabular or cavernous quartz.

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