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Duftite-alpha Mineral Data

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General Duftite-alpha Information

Help on Chemical  Formula: Chemical Formula: PbCu(AsO4)(OH)
Help on Composition: Composition: Molecular Weight = 426.67 gm
   Copper    14.89 %  Cu   18.64 % CuO
   Arsenic   17.56 %  As   26.93 % As2O5
   Hydrogen   0.24 %  H     2.11 % H2O
   Lead      48.56 %  Pb   52.31 % PbO
   Oxygen    18.75 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbCu(AsO4)(OH)
Help on Environment: Environment: Secondary mineral in the oxidized zone of hydrothermal base metal deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Tsumeb, Namibia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1920 for G. Duft, general manager of the mine at Tsumeb, Namibia.
Help on Name Pronunciation: Name Pronunciation: Duftite-alpha Say DUFTITE-ALPHA
Help on Synonym: Synonym: Duftite-beta - compositional intermediate in the duftite-conichalcite series

Duftite-alpha Image

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  Duftite-alpha   Mimetite

Comments: Mimetite crystals are replaced by Duftite-alpha on a gossanous matrix.
Location: Mt. Bonnie Mine, Northern Territory, Australia. Scale: Crystal size to 3mm.
© John Veevaert

Duftite-alpha Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8433:1:0.6512
Help on Cell Dimensions: Cell Dimensions: a = 7.768, b = 9.211, c = 5.999, Z = 4; V = 429.23 Den(Calc)= 6.60
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.26(1), 2.65(0.8), 2.85(0.8),

Physical Properties of Duftite-alpha

Help on Color: Color: Green, Olive green, Grayish green.
Help on Density: Density: 6.4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Dull

Optical Properties of Duftite-alpha

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.103 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1626,KPDmeas= 0.1677,KC= 0.1521
Ncalc = 1.97 - 2
Help on Optical Data: Optical Data: Biaxial (-), a=2.04, b=2.08, g=2.1, bire=0.0600

Calculated Properties of Duftite-alpha

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Duftite-alpha =6.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEDuftite-alpha = 879.99 barns/electron
U=PEDuftite-alpha x rElectron Density=5,036.53 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Duftite-alpha is Not Radioactive

Duftite-alpha Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.02)Descloizite Group Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
Help on  Strunz Class: Strunz Class: 08.BH.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.35 Austinite CaZn(AsO4)(OH) P 212121 2 2 2
08.BH.35 Adelite CaMg(AsO4)(OH) P 212121 2 2 2
08.BH.35 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2
08.BH.35 Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
08.BH.35 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2
08.BH.35 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2
08.BH.35 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2
08.BH.35 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2
08.BH.35 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2
08.BH.35 Tangeite CaCu(VO4)(OH) P 212121 2 2 2
08.BH.35 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2

Other Duftite-alpha Information

Help on References: References: NAME( AntBidBlaNic4) 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 Duftite-alpha :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.BH.35





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