Hydroxylhedyphane

hydroxylhedyphane

braunite

hausmannite

hedyphane group

Images

Formula: Ca2Pb3(AsO4)3(OH)
Arsenate, hedyphane group, apatite supergroup
Crystal System: Trigonal
Specific gravity: 6.205 calculated
Hardness: 4 to 5
Colour: Colourless
Environments

Metamorphic environments

Hydroxylhedyphane is a relatively new mineral, approved in 2018.

Localities

At the type locality, the Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden, hydroxylhedyphane has been discovered in a complexly deformed and metamorphosed submarine, volcanogenic, massive sulphide deposit. It occurs as colourless prismatic crystals, up to 2.5 cm in length, forming an oriented intergrowth with a serpentine subgroup mineral, as fracture-fillings cutting braunite and hausmannite ore (EJM 31.5.1015-1024, HOM).

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