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Walthierite Mineral Data

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General Walthierite Information

Help on Chemical  Formula: Chemical Formula: Ba0.5Al3(SO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 443.78 gm
   Barium    15.47 %  Ba   17.28 % BaO
   Aluminum  18.24 %  Al   34.46 % Al2O3
   Hydrogen   1.36 %  H    12.18 % H2O
   Sulfur    14.45 %  S    36.08 % SO3
   Oxygen    50.47 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.5Al3(SO4)2(OH)6
Help on Environment: Environment: Open-space filling of a fault, formed by reaction of hydrothermal fluids with barite.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Reina vein, about seven km southeast of the El Indio mine, El Indio-Tambo district, east of La Serena, Coquimbo, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Thomas Nash Walthier (1923-1990), American economic geologist, St. Joseph Minerals Co., who worked in the Tambo district, Chile.
Help on Name Pronunciation: Name Pronunciation: Walthierite + Pronunciation Say WALTHIERITE
Help on Synonym: Synonym: IMA1991-008
 

Walthierite Image

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  Walthierite

Comments: SEM BSE image of subhedral and euhedral walthierite (light gray) enclosed within alunite (dark gray). (AmMin, v77:1275).
Location: El Indio gold, silver, and copper deposit, Tambo mining district, Coquimbo region, Chile. Scale: See Image.
© American Mineralogist

Walthierite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.92605
Help on Cell Dimensions: Cell Dimensions: a = 6.992, c = 34.443, Z = 6; V = 1,458.26 Den(Calc)= 3.03
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.98(1), 2.283(0.8), 1.909(0.7),
 

Physical Properties of Walthierite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: White, Yellowish.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Walthierite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1967,KC= 0.1987
Ncalc = 1.6
Help on Optical Data: Optical Data: Uniaxial (+), w=1.588, e=1.604, bire=0.0160.
 

Calculated Properties of Walthierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Walthierite =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEWalthierite = 64.89 barns/electron
U=PEWalthierite x rElectron Density= 192.29 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Walthierite is Not Radioactive
 

Walthierite Classification

Help on  Dana Class: Dana Class: 30.02.04.07 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.02)where (A B)2 XO4 Zq
  (30.02.04)Alunite Group (Alunite Subgroup)
 
30.02.04.01 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
30.02.04.02 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.03 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.04 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
30.02.04.05 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.06 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.07 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.08 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 07.BC.10 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
 
07.BC.10 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
07.BC.10 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
07.BC.10 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
07.BC.10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 

Other Walthierite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.77,p1275-1284,1992) OPTIC PROP.(Am.Min.,Vol.77,p1275-1284,1992)
Help on See Also: See Also: Links to other databases for Walthierite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Walthierite Specimen Label here :

Walthierite

Ba0.5Al3(SO4)2(OH)6
Dana No: 30.02.04.07 Strunz No: 07.BC.10
Locality:

 

Notes:

 

 
   
 


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