Moolooite

Moolooite is a rare blue-green mineral with the formula Cu(C₂O₄)·n(H₂O) (n<1) (copper(II) oxalate hydrate). It was discovered in Bunbury Well, Mooloo Downs station, Murchison, Western Australia in 1986.^[3] It has an orthorhombic crystalline structure, and is formed by the interaction of bird guano with weathering copper sulfides.

CategoryOxalate mineral

FormulaCu(C₂O₄) · 0.4H₂O

IMA symbolMoo^[1]

Strunz classification10.AB.15

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Moolooite
Blue massive moolooite (field of view 12 mm)
General
Category	Oxalate mineral
Formula	Cu(C2O4) · 0.4H2O
IMA symbol	Moo[1]
Strunz classification	10.AB.15
Crystal system	Orthorhombic
Crystal class	Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Space group	Pnnm
Identification
Color	green
Specific gravity	3.43 (calculated)
Density	2.6
References	[2]

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A second occurrence is reported from the Sainte-Marie-aux-Mines silver mining district of Vosges Mountains, France.^[3]