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Mineralpedia Details for Barytocalcite

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Barytocalcite

Barytocalcite

Named after the barium and the calcite and carbonate in the composition. Barytocalcite is a rare to uncommon mineral that can be found in localities in England, Wales, Germany, the Czech Republic, Russia, Australia, China, Canada, the United States, and several others. It is an accessory mineral in metallic veins and forms as a reaction of hydrothermal fluid with limestone, but may be the dominant barium-bearing species. It can also be found in carbonatites and Alpine veins. Barytocalcite will fluoresce yellow to red under long- and short-wave ultraviolet light.

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

Formula
BaCa(CO3)2 
Crystal System
Monoclinic 
Crystal Habit
Druse, Massive - Granular, Prismatic 
Cleavage
Perfect, Perfect, Distinct 
Luster
Vitreous - Resinous 
Color
white, yellow, gray, greenish gray 
Streak
white 
Class
Monoclinic - Sphenoidal 
Fracture
Sub Conchoidal 
Hardness
WebMineral
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Mindat
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Barytocalcite from Admiralty Flaty, Alston Moor, Cumbria, England

Barytocalcite
            from Admiralty Flaty, Alston Moor, Cumbria, England

Stark white, bladed crystals to over 1cm in a rosette like aggregate. The underside of this specimen shows a yellowish, translucent core as opposed to the chalky white surface as shown in the photos.

Click thumbnail images for larger view.

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