Normal phosphate, forms a series with hallimondite
Specific gravity: 5.37
Hardness: 2½ to 3
Colour: Pale citron yellow
Solubility: Soluble in acids
Parsonite occurs as a secondary mineral in the oxidised
zone of some hydrothermal uranium deposits
At Lachaux, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France, parsonite occurs with pyromorphite, torbernite and autunite (HOM).
At Wölsendorf, Schwarzach bei Nabburg, Schwandorf District, Upper Palatinate, Bavaria, Germany, parsonite occurs with uranocircite (Dana).
In the Huachuca Mountains, Cochise County, Arizona, USA, parsonite occurs as crusts on quartz (Dana).
At the Ruggles Mine, Grafton, Grafton county, New Hampshire, USA, parsonite occurs with autunite and phosphuranylite (Dana).
At the type locality, the Shinkolobwe mine, Shinkolobwe, Kambove District, Haut-Katanga, DR Congo, parsonite occurs with torbernite, kasolite and dewindtite (Dana).
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