Parsonsite
(repeating unit)Pb2(UO2)(PO4)2·2H2O IMA symbol Pso[1] Strunz classification 8.EA.10 Crystal system Triclinic Crystal class Pinacoidal (1)
(same H-M symbol) Space group P1 Identification Color Pale citron-yellow Crystal habit Elongate and flattened tiny crystals, may resemble laths, crusts, powdery aggregates Cleavage None observed Mohs scale hardness 2.5-3 Luster Sub-adamantine Diaphaneity Transparent to translucent Specific gravity 5.37 Optical properties Pale yellow color Pleochroism None Ultraviolet fluorescence Does not fluoresce in UV light Solubility Soluble in acids Other characteristics Radioactive References [2]
(same H-M symbol)
Parsonsite is a lead uranium phosphate mineral with chemical formula: Pb2(UO2)(PO4)2·2H2O. Parsonsite contains about 45% lead and 25% uranium. It forms elongated lathlike pseudo monoclinic crystals, radial spherulites, encrustations and powdery aggregates. It is of a light yellow colour. It has a Mohs hardness of 2.5-3 and a specific gravity of 5.72 - 6.29.[3][4]
It was first described in 1923 for an occurrence in the Shinkolobwe mine, Katanga Copper Crescent, Democratic Republic of Congo. It was named for mineralogist Arthur Leonard Parsons (1873–1957) of the University of Toronto, Canada.[4][5]
References
Bibliography
- Palache, P.; Berman H.; Frondel, C. (1960). "Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 913-914.
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