Hydroxylwagnerite
Hydroxylwagnerite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mg₂(PO₄)(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/c). It is a member of the Wagnerite structural group.
Key properties: Mohs hardness 5; specific gravity 3.074; White streak; Vitreous luster; optically biaxial.
IMA symbol Hwag, IMA status: approved, named in 2004.
An accessory rock-forming mineral in quartz-rich, pyrope-kyanite-phengite schist lenses within metagranite in ultrahigh-pressure metamorphic rocks.
It is found associated with Talc, clinochlore, kyanite, rutile, apatite, pyrope.
Indicates the hydroxyl analogue of wagnerite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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