Gurzhiite

gurzhiite

khademite

quartz

uranyl

Images

Formula: Al(UO₂)(SO₄)₂F.10H₂O
Uranyl sulphate
Crystal System: Triclinic
Specific gravity: 2.52 measured, 2.605 calculated
Hardness: 2
Streak: White
Colour: Pale yellow (crystals) to lemon yellow (aggregates)
Luminescence: Bright yellow-green fluorescence in both short wave and long wave UV
RADIOACTIVE
Environments

Sedimentary environments
Hydrothermal environments

Gurzhiite is a new mineral, approved in 2021 and to date (August 2022) reported only from the type locality.

Localities

At the type locality, Mine no. 2, Byk Mountain, Lermontovskoe U Deposit, Pyatigorsk, Stavropol Krai, Russia, gurzhiite occurs as fine-grained yellow aggregates forming veinlets up to 50 cm long in cracks of the brecciated rock. Gurzhiite aggregates are composed of small bladed crystals up to 0.1 mm across. Associated minerals include khademite and quartz (MM 86.3.412-421).

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