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Mineralpedia Details for Caracolite

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Caracolite

Caracolite

Named for the type locality at the Beatriz mine near the town of Caracoles in the Antofagasta region of Chile. Caracolite is a rare mineral that can be found in additional Chilean localities including the Generosa, Herminia, La Compania, and San Francisco mines in Antofagasta and the Buena Esperanza and Lolon mines in the Tarapaca region, as well as in Germany at the Auguste-Victoria mine in North Rhine-Westphalia, and in Ukraine. Caracolite occurs in oxidized chlorine-rich lead deposits as a secondary mineral. Caracolite will decompose in water and leave behind lead sulfate, PbSO4.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/caracolite.pdf

Formula
Na2(Pb2Na)(SO4)3Cl 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, greenish gray, gray 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
4.5 
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Caracolite from Challacollo mine, Iquique, Tarapaca Prov., Chile

Caracolite
            from Challacollo mine, Iquique, Tarapaca Prov., Chile

Clear, hexagonal prism to 2mm of Caracolite on matrix.

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