Azurite
Azurite is a saft, deep blue capper mineral produced bi wathering o capper ure deposits.
| Azurite | |
|---|---|
 | |
| General | |
| Category | Carbonate meeneral |
| Formula (repeatin unit) | Cu3(CO3)2(OH)2 |
| Strunz clessification | 5.BA.05 |
| Creestal seestem | Monoclinic |
| Creestal cless | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/c |
| Unit cell | a = 5.01 Å, b = 5.85 Å c = 10.35 Å; β = 92.43°; Z = 2 |
| Identification | |
| Formula mass | 344.67 g/mol |
| Colour | Azure-blue, Berlin blue, verra daurk tae pale blue; pale blue in transmittit licht |
| Creestal habit | Massive, prismatic, stalactitic, tabular |
| Twinnin | Rare, twin planes Template:Mset, Template:Mset or Template:Mset |
| Cleavage | Perfect on Template:Mset, fair on Template:Mset, puir on Template:Mset |
| Fractur | Conchoidal |
| Tenacity | brittle |
| Mohs scale haurdness | 3.5 tae 4 |
| Skinkle | Vitreous |
| Streak | Light blue |
| Diaphaneity | Transparent tae translucent |
| Speceefic gravity | 3.773 (meisurt), 3.78 (calculatit) |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.730 nβ = 1.758 nγ = 1.838 |
| Birefringence | δ = 0.108 |
| Pleochroism | Veesible shades o blue |
| 2V angle | Measured: 68°, calculated: 64° |
| Dispersion | relatively waik |
| References | [1][2][3] |