Hematolite

arsenate

manganite

Formula: (Mn,Mg,Al)15(AsO4)2(AsO3)(OH)23
Anhydrous compound arsenate containing hydroxyl
Specific gravity: 3.49
Hardness: 3½
Streak: Light chocolate-brown to reddish brown
Colour: Brown-red, blood-red, nearly black; reddish orange to yellowish brown in transmitted light
Solubility: Readily soluble in acids
Environments:

Metamorphic environments
Hydrothermal environments

Hematolite occurs in fissures in metamorphosed limestone in iron-manganese orebodies, associated with allactite, manganosite, pyrochroite, covellite, franklinite, friedelite, retzian-(Nd), willemite, magnetite, jacobsite, calcite, chlorophoenicite, baryte and fluorite (HOM, Mindat).

At the type locality, the Moss mine, Filipstad, Värmland, Sweden, hematolite occurs in veinlets or cavities in crystalline limestone of a stratabound manganese-iron ore deposit. Associated minerals include magnetite, jacobsite, manganosite, fluorite, calcite and baryte. Hematolite is known only from this area (Mindat, AM63.150-159).

Hematolite alters to manganite (Mindat).

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