Mineralogy Database

Jamesite Mineral Data

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General Jamesite Information

Help on Chemical  Formula: Chemical Formula: Pb2Zn2Fe+++5(AsO4)5O4
Help on Composition: Composition: Molecular Weight = 1,583.01 gm
   Zinc      8.26 %  Zn   10.28 % ZnO
   Iron     17.64 %  Fe   25.22 % Fe2O3
   Arsenic  23.66 %  As   36.30 % As2O5
   Lead     26.18 %  Pb   28.20 % PbO
   Oxygen   24.26 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Zn2Fe3+5(AsO4)5O4
Help on Environment: Environment: Secondary mineral in oxidized lead ore in a dolostone-hosted hydrothermal polymetallic ore deposit.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Christopher James, one of the first mining engineers at the Tsumeb mine, Namibia.
Help on Name Pronunciation: Name Pronunciation: Jamesite Say JAMESITE
Help on Synonym: Synonym: ICSD 87744
  PDF 35-509

Jamesite Image

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  Jamesite   Duftite-beta

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

Jamesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.586:1:1.0715
Help on Cell Dimensions: Cell Dimensions: a = 5.622, b = 9.593, c = 10.279, Z = 1; alpha = 109.8°, beta = 90.54°, gamma = 97.69° V = 516.88 Den(Calc)= 5.09
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.4(1), 3.04(0.9), 9.67(0.8),

Physical Properties of Jamesite

Help on Color: Color: Reddish brown.
Help on Density: Density: 5.1
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Subadamantine

Optical Properties of Jamesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1948,KPDmeas= 0.1944,KC= 0.192
Ncalc = 1.98
Help on Optical Data: Optical Data: Biaxial (-), a=1.96, b=1.995, g=2.02, bire=0.0600, 2V(Calc)=78, 2V(Meas)=75.

Calculated Properties of Jamesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Jamesite =5.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEJamesite = 474.52 barns/electron
U=PEJamesite x rElectron Density=2,173.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jamesite is Not Radioactive

Jamesite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.11)with miscellaneous formulae
  (41.11.02)Dana Group Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1
Help on  Strunz Class: Strunz Class: 08.BK.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BK -With medium-sized and large cations, (OH, etc.)
08.BK.25 Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1
08.BK.25 Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1

Other Jamesite 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 Jamesite :
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: 08.BK.25





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