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