Cadwaladerite Mineral Data + 
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- 10.5.1.1 Cadwaladerite Al(OH)2Cl·4(H2O) None
- 10.5.1.2 Lesukite! Al2(OH)5Cl·2(H2O) I m3m 4/m 3 2/m
- III/A.13-05 Lesukite! Al2(OH)5Cl·2(H2O) I m3m 4/m 3 2/m
- III/A.13-10 Cadwaladerite Al(OH)2Cl·4(H2O) None
- III/A.13-20 Chloraluminite AlCl3·6(H2O) R 3c 3 2/m
- III/A.13-30 Hydromolysite? FeCl3·6(H2O) C 2/m 2/m
General Cadwaladerite Information |
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 Chemical Formula: |
Al(OH)2Cl·4(H2O) | ||
| Composition: |
Molecular Weight = 168.51 gm | ||
| Aluminum 16.01 % Al 30.25 % Al2O3 | |||
| Hydrogen 5.98 % H 53.45 % H2O | |||
| Chlorine 21.04 % Cl 21.04 % Cl | |||
| - % Cl -4.75 % -O=Cl2 | |||
| Oxygen 56.97 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Al(OH)2Cl·4(H2O) | ||
| Environment: |
In a sulfate deposit, embedded in halite. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1941 | ||
| Locality: |
On mine dumps at Cerro Pintados, 80 km southeast of Iquique, Tarapaca, Chile. Link to MinDat.org Location Data. | ||
| Name Origin: |
For Charles Meigs Biddle Cadwalader, formerly President of the Academy of Natural Sciences, Philadelphia, Pennsylvania, USA. | ||
Cadwaladerite Image | |||
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Images:
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Cadwaladerite Crystallography |
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| Crystal System: |
Amorphous- No Crystals | ||
Physical Properties of Cadwaladerite |
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| Cleavage: |
None | ||
| Color: |
Lemon. | ||
| Density: |
1.66 | ||
| Diaphaniety: |
Transparent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Luster: |
Vitreous (Glassy) | ||
Optical Properties of Cadwaladerite |
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| Gladstone-Dale: |
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.309,KC= 0.3109 |
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| Optical Data: |
Isotropic, n=1.513. | ||
Calculated Properties of Cadwaladerite |
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| Electron Density: |
relectron=1.73 gm/cc |
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| Fermion Index |
Fermion Index = 0.00028 Boson Index = 0.99972 |
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| Photoelectric: |
PECadwaladerite = 1.92 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cadwaladerite is Not Radioactive |
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Cadwaladerite Classification |
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| Dana Class: |
10.5.1.1 (10)Oxyhalides and Hydroxyhalides | ||
| (10.5)where Am (O,OH)p Xq | |||
| (10.5.1)Dana Group | |||
| Strunz Class: |
III/A.13-10 III - Halogenides | ||
| III/A - Simple Halogenides, with water Metal : Halogen = 1 : 1 to 1 : 3 | |||
| III/A.13 - Cadwaladerite - Hydromolysite series | |||
Other Cadwaladerite Information |
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Cadwaladerite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Cadwaladerite using: Visit our Advertisers for Cadwaladerite : Translate Cadwaladerite Mineral Data : Ask about Cadwaladerite here : Print or Cut-and-Paste your Cadwaladerite Specimen Label here :
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