Jamesite
A valid IMA mineral species
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About Jamesite
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.
This page provides mineralogical data about Jamesite.
Unique Identifiers
Mindat ID:
2071
Long-form identifier:
mindat:1:1:2071:4
GUID
(UUID V4):
(UUID V4):
ecada97b-532f-45c1-8a65-647192480984
IMA Classification of Jamesite
Approved
IMA Formula:
Pb2ZnFe3+2(Fe3+,Zn)4(AsO4)4(OH)8(OH,O)2
First published:
1981
Classification of Jamesite
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
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
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
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Jms | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Jamesite
Sub-Adamantine
Transparency:
Transparent
Colour:
Reddish brown
Streak:
Pale brown
Hardness:
3 on Mohs scale
Density:
5.084 g/cm3 (Calculated)
Optical Data of Jamesite
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.
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 Jamesite
Mindat Formula:
Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10
Crystallography of Jamesite
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°
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 Structure
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2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0005590 | Jamesite | Cooper 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 53-60 | 1999 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Jamesite
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.
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 Jamesite
Other Language Names for Jamesite
Common Associates
Associated Minerals Based on Photo Data:
10 photos of Jamesite associated with Duftite | PbCu(AsO4)(OH) |
5 photos of Jamesite associated with Dolomite | CaMg(CO3)2 |
5 photos of Jamesite associated with Siderite | FeCO3 |
5 photos of Jamesite associated with Beudantite | PbFe3(AsO4)(SO4)(OH)6 |
4 photos of Jamesite associated with Tsumcorite | PbZn2(AsO4)2 · 2H2O |
3 photos of Jamesite associated with Goethite | α-Fe3+O(OH) |
Related Minerals - Strunz-mindat Grouping
8.BK.05 | Brazilianite | NaAl3(PO4)2(OH)4 |
8.BK.10 | Medenbachite | Bi2Fe3+Cu2+(AsO4)2O(OH)3 |
8.BK.10 | Neustädtelite | Bi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4 |
8.BK.10 | Cobaltneustädtelite | Bi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4 |
8.BK.15 | Curetonite | Ba(Al,Ti)(PO4)(OH,O)F |
8.BK.20 | Heyite | Pb5Fe2+2(VO4)2O4 |
8.BK.25 | Lulzacite | Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10 |
8.BK.30 | Nishanbaevite | KAl2O(AsO4)(SO4) |
8.BK.35 | Lehmannite | Na18Cu12TiO8(AsO4)8FCl5 |
Other Information
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 Jamesite
mindat.org URL:
https://www.mindat.org/min-2071.html
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References for Jamesite
Localities for Jamesite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Bulgaria | |
| Minceva-Stefanova (2001) |
Greece | |
| |
Rieck (1999) | |
Namibia (TL) | |
| Keller et al. (1981) +1 other reference |
USA | |
| - (2005) |
Quick NavTopAbout JamesiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia