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