Liversidgeite
Liversidgeite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Zn₆(PO₄)₄·7H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 3–3.5; specific gravity 3.21; White streak; Vitreous luster; optically biaxial.
IMA symbol Lsd, IMA status: approved, named in 2008.
Found as a secondary mineral in highly weathered portions of a metamorphosed Pb-Zn-Ag sulfide deposit.
It is found associated with Anglesite, pyromorphite, greenockite, sulfur, vanderheydenite.
The mineral was named to honor Archibald Liversidge (1846-1927), Professor of Geology and Mineralogy.
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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