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Formula: NaAlZr(PO4)2(OH)2.H2O
Hydrated normal phosphate, zirconium-bearing mineral
Crystal System: Triclinic
Specific gravity: 2.83 measured, 2.932 calculated
Hardness: 4 to 5
Streak: White
Colour: Pale pinkish orange to pale brownish orange
Luminescence: Not fluorescent under UV
Common impurities: Ca,K,Fe,Mn,Hf,P,Si,F
Environments
Localities
At the type locality, the Wycheproof granite quarry, Wycheproof, Buloke Shire, Victoria, Australia, wycheproofite
is found as compact, finely fibrous masses. The fibrous crystals are between 5 and 10 µm wide and up to several mm long,
occurring in cavities in pegmatites. Associated minerals
include
schorl, kosnarite,
eosphorite and cyrilovite
(Mindat).
Another associated mineral is selwynite
(CM 33.1.55–58).
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