Loseyite
Loseyite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Mn²⁺₄Zn₃(CO₃)₂(OH)₁₀.
It crystallizes in the monoclinic crystal system (space group A2/a).
Key properties: Mohs hardness 3; specific gravity 3.27; optically biaxial.
IMA symbol Los, grandfathered status — known before the IMA’s founding, named in 1929.
A very rare mineral found in veinlets in massive ore in a metamorphosed stratiform zinc orebody.
It is found associated with Pyrochroite, sussexite, chlorophoenicite, calcite.
The mineral was named to honor Samuel R. Losey (1830–1904), mineral collector of Franklin, New Jersey, 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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