Carminite

Carminite (PbFe3+2(AsO4)2(OH)2) is an anhydrous containing hydroxyl It is a rare secondary mineral that is structurally related to palermoite (CaFe3+2(AsO4)2(OH)2) is an analogue of Where is allahabad , with calcium in carminite. Mawbyite (same formula, different structure) of carminite; mawbyite is monoclinic and carminite is orthorhombic It has a molar mass It was discovered in 1850 and named for the characteristic carmine colour.