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Sulfate

Lauraniite

Cu₆Cd₂(SO₄)₂(OH)₁₂·5H₂O
Crystal systemMonoclinic
ClassSulfate
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Lauraniite

Lauraniite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Cu₆Cd₂(SO₄)₂(OH)₁₂·5H₂O.

It crystallizes in the monoclinic crystal system (space group P2_1/c).

Key properties: specific gravity 3.4; White streak; Vitreous luster; optically uniaxial.

IMA symbol Lra, IMA status: approved, named in 2019.

A secondary weathering-derived mineral in a zoned, high-sulfidation type deposit, with a pyrite-enargite core, enargite-tennantite middle zone, and a sphalerite-silver bearing galena outer zone.

It is found associated with Serpierite, brochantite, tennantite, chalcocite (Laurani); edwardsite, niedermayrite, lazaridisite (Tsumeb) Distribution From the Laurani mine.

The name is derived from the locality (the Laurani mine) where the studied material was collected.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more L minerals or help write this entry.