Seeligerite

Seeligerite is a rare complex lead chlorate iodate mineral with formula: Pb3Cl3(IO3)O. It is a yellow mineral crystallizing in the orthorhombic system. It has perfect to good cleavage in two directions and a quite high specific gravity of 6.83 due to the lead content. It is translucent to transparent with refractive indices of nα=2.120 nβ=2.320 nγ=2.320.[1]

Seeligerite
Seeligerita 01.JPG
Seeligerite crystals, from Sierra Gorda, Antofagasta Region, Chile.
General
CategoryIodate minerals
Formula
(repeating unit)		Pb3Cl3(IO3)O
Strunz classification4.KB.15
Crystal systemOrthorhombic
Crystal classDisphenoidal (222)
H-M symbol: (2 2 2)
Space groupC2221
Identification
References[1][2]


It was first reported in 1971 from the Casucha Mine, Sierra Gorda, Antofagasta Region, Chile. 


This article uses material from the Wikipedia article
 Metasyntactic variable, which is released under the 
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Attribution-ShareAlike 3.0 Unported License.