Perite Locality: Passa Limani Cove slag locality (Pacha Limani Cove slag locality), Passa Limani area, Lavrion District slag localities, Lavrion District (Laurion; Laurium), Attikí Prefecture (Attica; Attika), Greece Original description: Superb yellow group of tabular crystals of visually identified perite (1.2 mm) in association with red balls of an unidentified mineral. — Photo: Simone Ferrante · CC BY 3.0
Perite
A lead-bismuth oxychloride discovered in 1960 outside Långban, Sweden, named for economic geologist Per Geijer.
Intro adapted from Wikipedia (CC BY-SA).
Perite is an IMA-recognized mineral species in the halide class, with the chemical formula PbBiO₂Cl.
It crystallizes in the orthorhombic crystal system (space group Bmmb). It is a member of the Nadorite structural group.
Key properties: Mohs hardness 3; specific gravity 8.16; Adamantine luster.
IMA symbol Pe, IMA status: approved, named in 1960.
Found in fissures in skarn in a metamorphosed Fe–Mn deposit (Långban, Sweden); in oxidized bismuth-bearing base metal deposits.
It is found associated with Hausmannite, calcite (Långban, Sweden); galena, cerussite, plattnerite, kaolinite, muscovite, tourmaline (Glen Florrie Station, Western Australia); kettnerite.
The mineral was named to honor Per Adolf Geijer (1886–1976), Swedish economic geologist with the Geological Survey of Sweden.