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Cadwaladerite Mineral Data
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General Cadwaladerite Information
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 Chemical Formula: |
Al(OH)2Cl•4(H2O) |
| Composition: |
Molecular Weight = 168.51 gm |
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Aluminum 16.01 % Al 30.25 % Al2O3 |
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Hydrogen 5.98 % H 53.45 % H2O |
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Chlorine 21.04 % Cl 21.04 % Cl |
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- %
Cl -4.75 % -O=Cl2 |
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Oxygen 56.97 % O |
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______ ______ |
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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. |
| Name Pronunciation: |
Cadwaladerite + Pronunciation  |
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Cadwaladerite Image |
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Images:
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Cadwaladerite Crystallography
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| Crystal System: |
Amorphous- No Crystals |
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Physical Properties of Cadwaladerite
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| Cleavage: |
None |
| Color: |
Lemon. |
| Density: |
1.66 |
| Diaphaneity: |
Transparent |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Luster: |
Vitreous (Glassy) |
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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
Ncalc = 1.52 |
| Optical Data: |
Isotropic, n=1.513. |
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Calculated Properties of Cadwaladerite
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| Electron Density: |
Bulk Density (Electron Density)=1.73 gm/cc
note: Specific Gravity of Cadwaladerite =1.66 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0002824175
Boson Index = 0.9997175825 |
| Photoelectric: |
PECadwaladerite = 1.92 barns/electron
U=PECadwaladerite x rElectron Density= 3.33 barns/cc.
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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: |
10.05.01.01 (10)Oxyhalides and Hydroxyhalides |
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(10.05)where Am (O,OH)p Xq |
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(10.05.01)Dana Group |
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10.05.01.01 Cadwaladerite Al(OH)2Cl•4(H2O) None |
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10.05.01.02 Lesukite! Al2(OH)5Cl•2(H2O) I m3m 4/m 3 2/m |
| Strunz Class: |
03.BD.05 03 - HALIDES |
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03.B - Simple Halides, with H2O |
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03.BD -Simple Halides with H2O and additional OH |
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03.BD.05 Cadwaladerite Al(OH)2Cl•4(H2O) None |
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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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Cadwaladerite Specimen Label here :
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Cadwaladerite
Al(OH)2Cl•4(H2O)
Dana No: 10.05.01.01 Strunz No: 03.BD.05
Locality:
Notes:
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