Anhydrous normal arsenate
Specific gravity: 4.29
Streak: Light brown
Colour: Brown to yellowish brown; light yellow-brown in transmitted light
Solubility: Soluble in nitric acid
Caryinite is a rare arsenate, found almost exclusively in Sweden.
At the type locality, Långban, Filipstad, Värmland, Sweden, caryinite occurs in veinlets in skarn in a manganese-iron metamorphosed orebody, associated with hedyphane, hausmannite, calcite and berzeliite.
Caryinite alters to berzeliite.
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