Rouseite
Rouseite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Pb₂Mn²⁺(AsO₃)₂·2H₂O.
It crystallizes in the triclinic crystal system.
Key properties: Mohs hardness 3; specific gravity 4.2; Pale yellow streak; Dull, vitreous on cleavage surfaces luster; optically biaxial.
IMA symbol Rus, IMA status: approved, named in 1984.
A very rare species found on a museum specimen, in a fracture cutting calcite-hausmannite ore, from a metamorphosed Fe–Mn orebody.
It is found associated with Trigonite, finnemanite, hausmannite, calcite.
The name refers to Dr. Roland C. Rouse (1943–), American mineralogist, University of Michigan, Ann Arbor, Michigan, USA.
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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