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Formula: (Mn,Mg,Al)15(AsO4)2(AsO3)(OH)23
Anhydrous compound arsenate containing hydroxyl,
hematolite group,
manganese-bearing mineral
Crystal System: Trigonal
Specific gravity: 3.49 measured, 3.48 calculated
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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