What is "carminite"

n. (context mineral English) An orthorhombic-dipyramidal mineral containing aluminum, arsenic, cobalt, copper, hydrogen, iron, lead, and oxygen.

Carminite (PbFe(AsO)(OH)) is an anhydrous arsenate mineral containing hydroxyl. It is a rare secondary mineral that is structurally related to palermoite (LiSrAl(PO)(OH)). Sewardite (CaFe(AsO)(OH)) is an analogue of carminite, with calcium in sewardite in place of the lead in carminite. Mawbyite is a dimorph (same formula, different structure) of carminite; mawbyite is monoclinic and carminite is orthorhombic. It has a molar mass of 639.87 g. It was discovered in 1850 and named for the characteristic carmine colour.