Zincolivenite

Zincolivenite is a copper zinc arsenate mineral with formula CuZn(AsO4)(OH) that is a member of the olivenite group. Its colors range from green to blue, and its name comes from its composition of zinc and olivenite.[1]

Zincolivenite
Zincolivenite from Agios Konstantinos, Lavrion District Mines, Lavreotiki District, East Attica Prefecture, Greece
General
CategoryArsenate mineral
Formula
(repeating unit)
CuZn(AsO4)(OH)
Strunz classification8.BB.30
Dana classification41.06.06.06
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPnnm
Unit cella = 8.5839(15) Å
b = 8.5290(13) Å
c = 5.9696(9) Å; Z = 4
Identification
ColorGreen, greenish blue
Crystal habitPrismatic crystals, radiating
CleavagePerfect on {010}, imperfect on {101}
FractureConchoidal
TenacityBrittle
Mohs scale hardness3.5
LusterVitreous
StreakWhite
DiaphaneityTranslucent
Specific gravity4.33
Optical propertiesBiaxial (-)
Refractive indexnα = 1.736(2) nβ = 1.784(2) nγ = 1.788(2)
Birefringence0.052
PleochroismWeak X = light bluish green, Y = Z = light blue
2V angleMeasured: 30°
Dispersionr > v, very strong
ExtinctionParallel extinction
References[1][2]

It was first described from St Constantine, Lavrion District Mines, Laurium, Attica, Greece. It was approved by the International Mineralogical Association in 2006.[1]

References

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