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 | |
| Category | Arsenate mineral |
| Formula (repeating unit) | CuZn(AsO4)(OH) |
| 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 | [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]
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