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Mineralpedia Details for Parsonsite

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Parsonsite

Parsonsite

Named in honor of Arthur Leonard Parsons who was Professor of Mineralogy at the University of Toronto in Toronto, Canada. Parsonsite is an uncommon mineral found in the Democratic Republic of Conga, Germany, France, Portugal, Italy, Australia, and the United States among a few other localities. Parsonsite is a secondary mineral that occurs in oxidized uranium-rich deposits. Parsonsite is radioactive.

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

Formula
Pb2(UO2)(PO4)2ยท0-2H2
Crystal System
Triclinic 
Crystal Habit
Microscopic Crystals, Platy, Pseudo Hexagonal 
Cleavage
Indistinct, None, None 
Luster
Subadamantine 
Color
brown, greenish brown, yellow, yellow brown, light yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Conchoidal 
Hardness
2.5-3 
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Mindat
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Parsonsite from Majuba Hill mine, Pershing Co., Nevada, United States

Parsonsite
            from Majuba Hill mine, Pershing Co., Nevada, United States

Bright yellow to orange, prismatic micrio crystals on Galena matrix.

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Parsonsite from La Faye mine, Grury, Issy-l'Eveque, Saone-et-Loire, Burgundy, France

Parsonsite
            from La Faye mine, Grury, Issy-l'Eveque, Saone-et-Loire, Burgundy, France
Special Info
Radioactive!!

Very tiny yellow, acicular crystals less than 1mm in an area of 4 x 1.5cm. Ex. William Pinch specimen - see prov. tab.

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Parsonsite from Lachaux, Puy-de-Dôme, Auvergne, France

Parsonsite
            from Lachaux, Puy-de-Dôme, Auvergne, France

Exceptional waxy yellow elongated Parsonsite crystals to 1mm in three small pockets. Very nice piece.

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