Duftite-beta Mineral Data (original) (raw)
General Duftite-beta Information
PbCu(AsO4)(OH)
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
PbCu(AsO4)(OH)
Secondary mineral in the oxidized zone of hydrothermal base metal deposits. Duftite-beta (1956) is now considered a compositional intermediate in the duftite-conichalcite series
Discredited IMA 2006
Tsumeb, Namibia. Link to MinDat.org Location Data.
Named in 1920 for G. Duft, general manager of the mine at Tsumeb, Namibia.
Beta-duftite
Duftite-beta Image
Duftite-beta Comments: Intensely green Duftite-beta on fluorescent calcite. Location: Tsumeb mine, Tsumeb, Namibia.Scale: . © Fabre Minerals |
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Duftite-beta Jamesite Comments: Reddish-brown bladed jamesite crystals overgrown with white dolomite and associated with dark green duftite. Location: Tsumeb mine, Tsumeb, Otavi District, Oshikoto, Namibia.Scale: See Image. © Rruff Database |
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Duftite-beta Crystallography
a:b:c =0.8433:1:0.6512
a = 7.768, b = 9.211, c = 5.999, Z = 4; V = 429.23 Den(Calc)= 6.60
Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 212121
By Intensity(I/Io): 3.26(1), 2.65(0.8), 2.85(0.8),
Physical Properties of Duftite-beta
Green, Olive green, Grayish green.
6.4
Translucent
3 - Calcite
Vitreous - Dull
Optical Properties of Duftite-beta
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
Biaxial (-), a=2.04, b=2.08, g=2.1, bire=0.0600
Calculated Properties of Duftite-beta
Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Duftite-beta =6.60 gm/cc.
Fermion Index = 0.1
Boson Index = 0.9
PEDuftite-beta = 879.99 barns/electron
U=PEDuftite-beta x rElectron Density=5,036.53 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Duftite-beta is Not Radioactive
Duftite-beta Classification
41.05.01.04 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.05)where (A B)2 (XO4) Zq
(41.05.01)Adelite Group
41.05.01.01 Adelite CaMg(AsO4)(OH) P 212121 2 2 2
41.05.01.02 Conichalcite CaCu(AsO4)(OH) P 212121 2 2 2
41.05.01.03 Austinite CaZn(AsO4)(OH) P 212121 2 2 2
41.05.01.04 Duftite-beta? PbCu(AsO4)(OH) P 212121 2 2 2
41.05.01.05 Gabrielsonite PbFe(AsO4)(OH) P 21m mm2
41.05.01.06 Tangeite CaCu(VO4)(OH) P 212121 2 2 2
41.05.01.07 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 212121 2 2 2
41.05.01.08 Cobaltaustinite CaCo(AsO4)(OH) P 212121 2 2 2
41.05.01.09 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2
41.05.01.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 212121 2 2 2
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-beta Information
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Links to other databases for Duftite-beta :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
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Print or Cut-and-Paste your Duftite-beta Specimen Label here :
Duftite-beta
PbCu(AsO4)(OH)
Dana No: 41.05.01.04 Strunz No: 08.BH.35
Locality:
Notes: