Leningradite
Leningradite is an IMA-recognized mineral species in the vanadate class, with the chemical formula PbCu₃(VO₄)₂Cl₂.
It crystallizes in the orthorhombic crystal system (space group Ibam).
Key properties: Mohs hardness 4.25; specific gravity 4.81; Red-orange streak; Vitreous luster; optically biaxial.
IMA symbol Lng, IMA status: approved, named in 1988.
Found in volcanic fumaroles, deposited at about 140° C.
It is found associated with Tolbachite, lammerite, anglesite, hematite.
The name refers to the city of Leningrad (once and again St. Petersburg), in the Universities of which this and related minerals have been studied.
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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