Classification of Caichengyunite |
| IMA status: | Published without Approval |
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| mindat.org URL: | http://www.mindat.org/min-39649.html
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Type Occurrence of Caichengyunite |
| Type Locality: | Longshu Pb-Zn deposit, Huidong Co., Liangshan Autonomous Prefecture, Sichuan Province, China |
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| Place of Conservation of Type Material: | not given |
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| Associated Minerals at type locality: | |
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Physical Properties of Caichengyunite |
| Lustre: | Vitreous, Silky |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | grayish white |
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| Streak: | white |
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| Hardness (Mohs): | 1½ - 2 |
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| Density (measured): | 2.20 g/cm3 |
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| Density (calculated): | 2.19 g/cm3 |
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Crystallography of Caichengyunite |
| Crystal System: | Monoclinic |
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| Cell Parameters: | a = 7.63Å, b = 24.13Å, c = 22.64Å
β = 111.06° |
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| Ratio: | a:b:c = 0.316 : 1 : 0.938 |
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| Unit Cell Volume: | V 3,889.87 ų (Calculated from Unit Cell) |
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| Z: | 4 |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 5.494 | | (14) | | 4.886 | | (100) | | 3.776 | | (21) | | 3.252 | | (13) | | 2.727 | | (12) |
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Optical Data of Caichengyunite |
| Type: | Biaxial (+) |
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| RI values: | nα = 1.476 nβ = 1.478 nγ = 1.481 |
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| Maximum Birefringence: | δ = 0.005
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Moderate |
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| Optical Extinction: | inclined extinction 5-10o parallel to the fibers |
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Chemical Properties of Caichengyunite |
| Formula: | |
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| Essential elements: | Al, Fe, H, O, S |
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| All elements listed in formula: | Al, Fe, H, O, S |
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Other Information |
| Fluorescence in UV light: | none |
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| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for Caichengyunite |
Reference List:
- + | Ru-bo Zhang, et al. Caichengyunite: a hydrous sulphate mineral. J. Central Soutn Univ Technolo 3394),331-334(2002) [Am. Min.89,894(2004)](abstract) |
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Internet Links for Caichengyunite |
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Localities for Caichengyunite |
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