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Mineralpedia Details for Haidingerite

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Haidingerite

Haidingerite

Named to honor Wilhelm Karl von Haidinger, an Austrian mineralogist. Haidingerite is a rare mineral that forms from the dehydration of pharmacolite at one of its localities at the Getchell mine in Nevada, USA. Other localities for Haidingerite include the Czech Republic, Germany, France, Poland, Kyrgyzstan, and others in the United States with additional newer localities in Switzerland, Belgium, and Morocco.

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

Formula
Ca(AsO3OH)┬ĚH2
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Encrustations 
Cleavage
Perfect, None, None 
Luster
Vitreous - Adamantine 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Sectile 
Hardness
2-2.5 
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Haidingerite from Svornost mine, Jáchymov, Erzgebirge, Bohemia, Czech Republic

Haidingerite
            from Svornost mine, Jáchymov, Erzgebirge, Bohemia, Czech Republic

Chalky white, platy crystals to 4mm lying flat on matrix. 

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Haidingerite from Jachymov, Erzgegirge, Bohemia, Czech Republic

Haidingerite
            from Jachymov, Erzgegirge, Bohemia, Czech Republic
Special Info
Type Locality

Colorless or murky white prismatic crystals of Haidingerite to 5mm with white acicular groups of Pharmacolite.

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