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Formula: Pb3(UO2)6O8(OH)2.3H2O
Hydroxide, uranyl mineral
Crystal System: Monoclinic
Specific gravity: 7.64 calculated
Hardness: 4
Streak: Pale orange
Colour: Bright orange
RADIOACTIVE
Environments
Localities
At the type locality, Mount Painter No. 2 workings, Mt Painter area, Arkaroola Region, North Flinders Ranges,
South Australia, spriggite occurs as prismatic crystals to 0.15 mm, forming aggregates to 1 cm across, in
strongly oxidised samples of a
quartz-hematite
breccia enriched in uranium, niobium and rare earth element minerals.
The spriggite results from the supergene alteration of
the breccia. Associated minerals include
uranophane-β, soddyite, smoky
quartz, kasolite,
cerium-rich françoisite-(Nd),
metatorbernite, hematite,
billietite, barium-bearing
boltwoodite, schoepite,
rutherfordine, metaschoepite
and weeksite
(AM 89.399-347, Mindat, HOM).
Spriggite from Mount Painter - Image
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