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Formula: Mg2[(Ti,Mg),Fe3+]O2(BO3)
Anhydrous monoborate,
ludwigite group,
titanium-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.63 meaasured, 3.63 calculated
Hardness: 5½
Colour: Black
Solubility: Readily dissolved by dilute hydrochloric acid, not dissolved by 1:3 nitric acid
Magnetism: Paramagnetic
Environments
Localities
At the type locality, the Tazheranskii Massif, Lake Baikal area, Russia, azoproite occurs as an uncommon
late-stage mineral in the border zone in magnesian
contact metamorphic rocks associated with
syenites. The azoproite forms prismatic crystals 1 to 20 mm
long and 0.1 to 5 mm wide. Associated minerals include calcite,
ludwigite, brucite,
clinohumite, baddeleyite,
tazheranite, perovskite,
geikielite and forsterite
(HOM, Mindat).
Azoproite from the Tazheranskii Massif -
Image
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