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Jamesite

A valid IMA mineral species
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About JamesiteHide

Formula:
Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10
Colour:
Reddish brown
Lustre:
Sub-Adamantine
Hardness:
3
Specific Gravity:
5.084 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of Christopher James, an American mining engineer, commissioned by OMEG to open the Tsumeb mine in 1900.
Isostructural with:
This page provides mineralogical data about Jamesite.


Unique IdentifiersHide

Mindat ID:
2071
Long-form identifier:
mindat:1:1:2071:4
GUID
(UUID V4):
ecada97b-532f-45c1-8a65-647192480984

IMA Classification of JamesiteHide

Approved
IMA Formula:
Pb2ZnFe3+2(Fe3+,Zn)4(AsO4)4(OH)8(OH,O)2
First published:
1981

Classification of JamesiteHide

8.BK.25

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1
41.11.2.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : Miscellaneous
20.5.15

20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
JmsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of JamesiteHide

Sub-Adamantine
Transparency:
Transparent
Colour:
Reddish brown
Streak:
Pale brown
Hardness:
Density:
5.084 g/cm3 (Calculated)

Optical Data of JamesiteHide

Type:
Biaxial (-)
RI values:
nα = 1.960(5) nβ = 1.995(5) nγ = 2.020(5)
2V:
Measured: 75° (5), Calculated: 78°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong
Optical Extinction:
Y ∧ a ≃ 5° on (001); Y ∧ a = 15° on (010).
Pleochroism:
Strong
Comments:
X = Y = pale brown; Z = deep red-brown.

Chemistry of JamesiteHide

Mindat Formula:
Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10

Crystallography of JamesiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.62 Å, b = 9.59 Å, c = 10.27 Å
α = 109.8°, β = 90.54°, γ = 97.69°
Ratio:
a:b:c = 0.586 : 1 : 1.071
Unit Cell V:
515.21 ų (Calculated from Unit Cell)
Z:
1

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005590JamesiteCooper M A, Hawthorne F C (1999) Local Pb-_ disorder in the crystal structure of jamesite, Pb2ZnFe2(Fe2.8Zn1.2)(AsO4)4(OH)8[(OH)1.2O.8], and revision of the chemical formula The Canadian Mineralogist 37 53-6019990293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.40 Å(100)
3.04 Å(90)
9.67 Å(80)
4.70 Å(80)
3.26 Å(80)
2.92 Å(60)
2.04 Å(60)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of JamesiteHide

General Appearance of Type Material:
Tabular crystals, elongated a, up to 0.5 x 0.2 x 0.05 mm.
Place of Conservation of Type Material:
Institute for Mineralogy and Crystal Chemistry, University of Stuttgart, Stuttgart, Germany, NM05.
National Museum of Natural History, Washington, D.C., USA, 143995.
Geological Setting of Type Material:
Oxidized zone of lead ore.
Associated Minerals at Type Locality:
Reference:
Keller, P., Hess, H., Dunn, P.J. (1981) Jamesite, Pb2Zn2Fe53+O4(AsO4)5, a new mineral from Tsumeb, Namibia. Chemie der Erde: 40: 105-109.

Synonyms of JamesiteHide

Other Language Names for JamesiteHide

German:Jamesit
Spanish:Jamesita

Common AssociatesHide

Associated Minerals Based on Photo Data:
10 photos of Jamesite associated with DuftitePbCu(AsO4)(OH)
5 photos of Jamesite associated with DolomiteCaMg(CO3)2
5 photos of Jamesite associated with SideriteFeCO3
5 photos of Jamesite associated with BeudantitePbFe3(AsO4)(SO4)(OH)6
4 photos of Jamesite associated with TsumcoritePbZn2(AsO4)2 · 2H2O
3 photos of Jamesite associated with Goethiteα-Fe3+O(OH)

Related Minerals - Strunz-mindat GroupingHide

8.BK.05BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m
8.BK.10MedenbachiteBi2Fe3+Cu2+(AsO4)2O(OH)3Tric. 1 : P1
8.BK.10NeustädteliteBi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.10CobaltneustädteliteBi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.15CuretoniteBa(Al,Ti)(PO4)(OH,O)FMon. 2/m
8.BK.20HeyitePb5Fe2+2(VO4)2O4Mon. 2/m : P21/m
8.BK.25LulzaciteSr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10Tric. 1 : P1
8.BK.30NishanbaeviteKAl2O(AsO4)(SO4)Orth. mmm (2/m 2/m 2/m) : Pbcm
8.BK.35Lehmannite Na18Cu12TiO8(AsO4)8FCl5Mon. 2/m : B2/m

Other InformationHide

Notes:
Soluble, with difficulty, in hot HNO3 and HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for JamesiteHide

References for JamesiteHide

Localities for JamesiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Bulgaria
 
  • Vratsa Province
    • Balkan Mts (Stara Planina)
Minceva-Stefanova (2001)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion mining district
          • Agios Konstantinos (Kamariza)
            • Mercati mines
Rieck (1999)
Namibia (TL)
 
  • Oshikoto Region
    • Tsumeb
Keller et al. (1981) +1 other reference
USA
 
  • Idaho
    • Shoshone County
      • Hunter Mining District
- (2005)
 
Mineral and/or Locality  
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