Pseudomarkeyite

pseudomarkeyite

natromarkeyite

markeyite

bitumen

Images

Formula: Ca₈(UO₂)₄(CO₃)₁₂(H₂O)₁₈.3H₂O
Carbonate, markeyite group
Crystal System: Monoclinic
Specific gravity: 2.88 measured
Hardness: 1
Streak: White
Colour: Pale green yellow
Luminescence: Bright bluish white fluorescence with a 405 nm laser
RADIOACTIVE
Environments

Sedimentary environments
Hydrothermal environments

Pseudomarkeyite is a relatively new mineral, approved in 2018 and to date (May 2022) reported only from the type locality.

Localities

At the type locality, the Markey Mine, Red Canyon Mining District, San Juan county, Utah, USA, pseudomarkeyite occurs as a secondary phase on bitumen (asphaltum), with natromarkeyite. It is found as pale green-yellow twinned tapering blades and tablets to 1 mm (MM84.5.753-765).

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