Uramphite

uramphite

liebigite

meta-autunite

plumbogummite

Images

Formula: (NH₄)(UO₂)(PO₄).3H₂O
Hydrated uranyl phosphate, meta-autunite group
Crystal System: Tetragonal
Specific gravity: 3.7 measured, 3.26 calculated
Hardness: 2 to 3
Streak: Greenish white
Colour: Pale green, bottle-green
Luminescence: Fluoresces yellow-green under UV
Very strongly RADIOACTIVE
Environments

Hydrothermal environments

Localities

At the type locality, the Tura-Kavak uranium-coal deposit, Minkush, Moldo-Too range, Naryn Region, Kyrgyzstan, uramphite occurs in the oxidised zone of the uranium-coal deposit in fractures in the coal at depths between 20 and 50 m (HOM).
Uramphite - Image

At Mine no. 1, Beshtau Mountain, Lermontovskoe U Deposit, Pyatigorsk, Stavropol Krai, Russia, uramphite is the second world occurrence after its type locality in Kyrgyzstan. In Beshtau, it occurs as yellow tabular crystals, up to 0.3 mm, grouped in crusts on a matrix composed of albite, microcline, quartz and chamosite in association with liebigite, meta-autunite and plumbogummite (AM 110.2.319–327).

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