Zincolivenite
(repeating unit)CuZn(AsO4)(OH) IMA symbol Zoli[1] Strunz classification 8.BB.30 Dana classification 41.06.06.06 Crystal system Orthorhombic Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m) Space group Pnnm Unit cell a = 8.5839(15) Å
b = 8.5290(13) Å
c = 5.9696(9) Å; Z = 4 Identification Color Green, greenish blue Crystal habit Prismatic crystals, radiating Cleavage Perfect on {010}, imperfect on {101} Fracture Conchoidal Tenacity Brittle Mohs scale hardness 3.5 Luster Vitreous Streak White Diaphaneity Translucent Specific gravity 4.33 Optical properties Biaxial (-) Refractive index nα = 1.736(2) nβ = 1.784(2) nγ = 1.788(2) Birefringence 0.052 Pleochroism Weak X = light bluish green, Y = Z = light blue 2V angle Measured: 30° Dispersion r > v, very strong Extinction Parallel extinction References [2][3]
H-M symbol: (2/m 2/m 2/m)
b = 8.5290(13) Å
c = 5.9696(9) Å; Z = 4
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.[2]
It was first described from St Constantine, Lavrion District Mines, Laurium, Attica, Greece. It was approved by the International Mineralogical Association in 2006.[2]
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