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Formula: PbCu2+Te6+O5(H2O)
Tellurate
Crystal System: Triclinic
Specific gravity: 6.304 calculated
Hardness: 2 to 3
Streak: Very pale bluish green
Colour: Bluish green
Luminescence: No fluorescence under UV
Solubility: Decomposes rapidly in dilute hydrochloric acid at room temperature
Environments
Localities
At the type locality, the Aga Mine, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino
County, California, USA, andychristyite occurs in vugs in quartz in
association with timroseite. It is thought to have formed from the partial
oxidation of primary sulphides and tellurides during or following
brecciation of quartz veins.
It forms as small transparent, tabular crystals up to ∼50 µm across, in sub-parallel aggregates, with adamantine lustre.
The colour is bluish green and the streak is very pale bluish green
(MM 80.6.1055-1065).
As well as quartz and timroseite,
other associated minerals include khinite,
hematite and goethite
(Mindat).
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