White Yellow crystals of the rare mineral phosphorrosslerite from a locality in New Mexico (Raton, Colfax County, New Mexico, United States of America). Only 3 known localities worldwide. Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Phosphorrösslerite
Phosphorrösslerite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mg(PO₃OH)·7H₂O.
Key properties: Mohs hardness 2.5; specific gravity 1.725; Vitreous, changing to dull on exposure luster; optically biaxial.
IMA symbol Prö, grandfathered status — known before the IMA’s founding, named in 1939.
Found in cold (10 ° C) wet muck in an abandoned mine.
As the phosphate analog of rösslerite.
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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