Yingjiangite

yingjiangite

studtite

calcurmolite

tengchongite

Images

Formula: K₂Ca(UO₂)₇(PO₄)₄(OH)₆.6H₂O
Hydrated phosphate containing hydroxyl, phosphuranylite group
Crystal System: Orthorhombic
Specific gravity: 4.15 measured, 4.17 calculated
Hardness: 3 to 4
Streak: Pale yellow
Colour: Yellow, golden yellow
Luminescence: Weak yellowish green fluorescence under short wave UV
Solubility:
Common impurities: Na,Mg,Mn,Fe,Ti,Si
Strongly RADIOACTIVE
Environments

Hydrothermal environments

Localities

At the type locality, the Uranium occurrence, Tongbiguan, Yingjiang County, Dehong, Yunnan, China, yingjiangite occurs as a secondary product in an oxidised zone containing uraninite and uranothorite. Associated minerals are studtite, calcurmolite, tengchongite and autunite (AM 76.1731).

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