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Formula: Pb8O4(OH)2(S2O3)3
Thiosulphate (the thiosulphate anion is (S6+O3S2-)2-, ie a sulphate anion
with one O replaced by S)
Crystal System: Orthorhombic
Specific gravity: 6.619 calculated
Hardness: 2½
Streak: Very pale yellow
Colour: Yellow
Environments
Boojumite is a new mineral, approved in 2022 and to date (May 2024) reported only from the type locality.
Localities
At the type locality, the Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA, boojumite and
kennygayite occur in a highly unusual
secondary assemblage that comprises a variety of rare
lead - zinc -
copper sulphates, thiosulphates and carbonates.
Boojumite was found in close association with bechererite,
caledonite,
cubothioplumbite,
hexathioplumbite,
hydroredmondite, redmondite,
steverustite and
sulfatoredmondite.
Boojumite occurs as yellow prisms or blades to about 0.3 mm long
(CJMP 62.2.391-403)
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