Paramarkeyite

paramarkeyite

andersonite

natromarkeyite

markeyite

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Formula: Ca₂(UO₂)(CO₃)₃.5H₂O
Carbonate, markeyite group
Crystal System: Monoclinic
Specific gravity: 2.91 measured
Hardness: 2½
Streak: White
Colour: Pale green-yellow
Luminescence: Moderate bluish-white fluorescence under a 405 nm laser
RADIOACTIVE
Environments

Hydrothermal environments

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

Localities

At the type locality, the Markey Mine, Red Canyon Mining District, San Juan County, Utah, USA, paramarkeyite occurs as a secondary phase on gypsum-coated bitumen in association with andersonite, calcite, gypsum and natromarkeyite. The paramarkeyite crystals are transparent, pale green-yellow, striated tablets, up to 0.11 mm across (MM 86.27-36).

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