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Cadwaladerite Mineral Data

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General Cadwaladerite Information

Help on Chemical  Formula: Chemical Formula: Al(OH)2Cl•4(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Al(OH)2Cl•4(H2O)
Help on Environment: Environment: In a sulfate deposit, embedded in halite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1941
Help on Locality: Locality: On mine dumps at Cerro Pintados, 80 km southeast of Iquique, Tarapaca, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Charles Meigs Biddle Cadwalader, formerly President of the Academy of Natural Sciences, Philadelphia, Pennsylvania, USA.
Help on Name Pronunciation: Name Pronunciation: Cadwaladerite + Pronunciation Say CADWALADERITE

Cadwaladerite Image

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Comments: Yellow crystalline grain of cadwaladerite, somewhat deliquescent.
Location: Cerro Pintados, south east of Iquique, Tarapaca, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cadwaladerite Crystallography

Help on Crystal System: Crystal System: Amorphous- No Crystals

Physical Properties of Cadwaladerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lemon.
Help on Density: Density: 1.66
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Cadwaladerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.309,KC= 0.3109
Ncalc = 1.52
Help on Optical Data: Optical Data: Isotropic, n=1.513.

Calculated Properties of Cadwaladerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.73 gm/cc
note: Specific Gravity of Cadwaladerite =1.66 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002824175
Boson Index = 0.9997175825
Help on Photoelectric: Photoelectric: PECadwaladerite = 1.92 barns/electron
U=PECadwaladerite x rElectron Density= 3.33 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cadwaladerite is Not Radioactive

Cadwaladerite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.05)where Am (O,OH)p Xq
  (10.05.01)Dana Group Cadwaladerite Al(OH)2Cl•4(H2O) None Lesukite! Al2(OH)5Cl•2(H2O) I m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 03.BD.05 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BD -Simple Halides with H2O and additional OH
03.BD.05 Cadwaladerite Al(OH)2Cl•4(H2O) None

Other Cadwaladerite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 03.BD.05





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