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Formula: (NH4)Na(UO2)2(SO4)2(OH)2.4H2O
Valence: (N3-H4)Na(U6+O2)2(SO4)2(OH)2.4H2O
Hydrated uranyl sulphate
Crystal System: Triclinic
Specific gravity: 3.469 calculated
Hardness: 2
Streak: White
Colour: Light green-yellow
Luminescence: Fluoresces greenish-blue in 405 nm laser light
Solubility: Easily soluble in water at room temperature
RADIOACTIVE
Environments
Sedimentary environments
Hydrothermal environments
Greenlizardite is a relatively new mineral, approved in 2017 and to date (June 2026) reported only from the
type locality.
Localities
At the type locality, the Green Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA,
greenlizardite occurs as a secondary alteration phase,
forming light green-yellow blades up to about 0.3 mm long, vitreous and transparent with a white streak
(MM 82.2.401–411).
It occurs on the walls of mines in
uranium-vanadium deposits that
replaced wood and other organic material in sandstones and
conglomerate (roll-front type U-V deposits). Associated minerals
include ammoniozippeite,
boussingaultite, dickite,
beshtauite, calcite,
gypsum, fermiite,
johannite, natrozippeite,
oppenheimerite, plášilite,
rozenite, shumwayite,
sulphur and wetherillite
(HOM).
Greenlizardite from the Green Lizard Mine -
Image
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