Widenmannite
A valid IMA mineral species
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About Widenmannite
Formula:
Pb2(OH)2[(UO2)(CO3)2]
Originally assumed to be Pb2(UO2)(CO3)3.
Colour:
Yellow, very pale greenish yellow, colorless
Lustre:
Silky, Pearly
Hardness:
2
Specific Gravity:
6.89 (Calculated)
Crystal System:
Orthorhombic
Name:
Named after Johann Friedrich Wilhelm Widenmann (1764-1798), German mining official ('WĂŒrttembergischer Bergrat') who, in 1793, first reported on the occurrence of an uranium mica in the Black Forest.
This page provides mineralogical data about Widenmannite.
Unique Identifiers
Mindat ID:
4285
Long-form identifier:
mindat:1:1:4285:3
GUID
(UUID V4):
(UUID V4):
505a332b-f957-4965-b3ae-4691528e2eb4
IMA Classification of Widenmannite
Approved
Approval year:
1974
First published:
1976
Classification of Widenmannite
5.ED.40
5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
14.1.5.1
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
11.11.19
11 : Carbonates
11 : Carbonates of Cr and U
11 : Carbonates
11 : Carbonates of Cr and U
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Wdm | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Widenmannite
Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Yellow, very pale greenish yellow, colorless
Streak:
Pale yellow
Hardness:
2 on Mohs scale
Cleavage:
Perfect
on {010}
on {010}
Density:
6.89 g/cm3 (Calculated)
Optical Data of Widenmannite
Type:
Biaxial (-)
RI values:
nα = 1.803(5) nβ = 1.905(5) nγ = 1.945(5)
2V:
Measured: 63° , Calculated: 60°
Max Birefringence:
δ = 0.142
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:
r > v extreme
Chemistry of Widenmannite
Mindat Formula:
Pb2(OH)2[(UO2)(CO3)2]
Originally assumed to be Pb2(UO2)(CO3)3.
Originally assumed to be Pb2(UO2)(CO3)3.
Crystallography of Widenmannite
Crystal System:
Orthorhombic
Cell Parameters:
a = 8.99 Å, b = 9.36 Å, c = 4.95 Å
Ratio:
a:b:c = 0.96 : 1 : 0.529
Unit Cell V:
416.52 Ă
Âł (Calculated from Unit Cell)
Z:
2
Morphology:
Lath-like crystals in tufts and mats
Comment:
Point Group: 2/m 2/m 2/m, mm2, or 222; Space Group: P nmm, P nm21, or P22121.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0020039 | Widenmannite | Plasil J, Palatinus L, Rohlicek J, Houdkovaq L, Klementova M, Golias V, Skacha P (2014) Crystal structure of lead uranyl carbonate mineral widenmannite: Precession electron-diffraction and synchrotron powder-diffraction study American Mineralogist 99 276-282 | 2014 | Brezove Hory deposit, Pribram ore district, Czech Republic | 0 | 293 | |
| 0020040 | Widenmannite | Plasil J, Palatinus L, Rohlicek J, Houdkovaq L, Klementova M, Golias V, Skacha P (2014) Crystal structure of lead uranyl carbonate mineral widenmannite: Precession electron-diffraction and synchrotron powder-diffraction study American Mineralogist 99 276-282 | 2014 | Brezove Hory deposit, Pribram ore district, Czech Republic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.16 Ă | (100) |
| 2.34 Ă | (100) |
| 3.19 Ă | (80b) |
| 3.34 Ă | (70) |
| 1.911 Ă | (50) |
| 1.869 Ă | (50) |
| 1.473 Ă | (50b) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47f : [Uranyl (Uâ¶âș) minerals] |
Type Occurrence of Widenmannite
Place of Conservation of Type Material:
[University of Strassburg, Strassburg, France.]
Geological Setting of Type Material:
Oxidation zone hydrothermal As-Pb deposit
Associated Minerals at Type Locality:
Reference:
Walenta, K. (1976) Widenmannit und Joliotit, zwei neue Uranylkarbonatmineralien aus dem Schwarzwald. Schweizerische Mineralogische und Petrographische Mitteilungen: 56: 167-185.
Synonyms of Widenmannite
Other Language Names for Widenmannite
German:Widenmannit
Spanish:Widenmannita
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Widenmannite associated with HĂŒgelite | Pb2(UO2)3(AsO4)2O2 · 5H2O |
| 2 photos of Widenmannite associated with Kasolite | Pb(UO2)(SiO4) · H2O |
| 2 photos of Widenmannite associated with Cerussite | PbCO3 |
| 1 photo of Widenmannite associated with Quartz | SiO2 |
| 1 photo of Widenmannite associated with Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| 1 photo of Widenmannite associated with Erythrite | Co3(AsO4)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 5.ED. | Paramarkeyite | Ca2(UO2)(CO3)3 · 5H2O |
| 5.ED. | Pendevilleite-(Y) | Mg2Y3Al(UO2)2(CO3)7(OH)6(H2O)16 |
| 5.ED.05 | Bayleyite | Mg2(UO2)(CO3)3 · 18H2O |
| 5.ED.10 | Swartzite | MgCa(UO2)(CO3)3 · 12H2O |
| 5.ED.15 | Albrechtschraufite | Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O |
| 5.ED.20 | Liebigite | Ca2(UO2)(CO3)3 · 11H2O |
| 5.ED.25 | Rabbittite | Ca3Mg3(UO2)2(CO3)6(OH)4 · 18H2O |
| 5.ED.30 | Andersonite | Na2Ca(UO2)(CO3)3 · 6H2O |
| 5.ED.35 | Grimselite | K3Na(UO2)(CO3)3 · H2O |
| 5.ED.45 | Znucalite | Zn10Ca0.83(UO2)0.83(CO3)4(OH)15.31(H2O)5.48 |
| 5.ED.50 | Äejkaite | Na4(UO2)(CO3)3 |
| 5.ED.50 | Agricolaite | K4(UO2)(CO3)3 |
| 5.ED.55 | LĂnekite | K2Ca3[(UO2)(CO3)3]2 · 8H2O |
| 5.ED.55 | Braunerite | K2Ca(UO2)(CO3)3 · 6H2O |
| 5.ED.60 | Leószilårdite | Na6Mg(UO2)2(CO3)6 · 6H2O |
| 5.ED.65 | Pseudomarkeyite | Ca8(UO2)4(CO3)12 · 21H2O |
| 5.ED.65 | Markeyite | Ca9(UO2)4(CO3)13 · 28H2O |
| 5.ED.65 | Natromarkeyite | Na2Ca8(UO2)4(CO3)13 · 27H2O |
| 5.ED.70 | Paddlewheelite | MgCa5Cu2(UO2)4(CO3)12(H2O)33 |
Fluorescence of Widenmannite
Non-fluorescent.
Other Information
Health Risks:
Radioactive
Internet Links for Widenmannite
mindat.org URL:
https://www.mindat.org/min-4285.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Widenmannite
Reference List:
Elton, N. J., Hooper, J. J. (1995) Widenmannite from Cornwall, England: the second world occurrence. Mineralogical Magazine, 59 (397) 745-749 doi:10.1180/minmag.1995.059.397.15
PlĂĄĆĄil, J., Äejka, J., Sejkora, J., Ć kĂĄcha, P., GoliĂĄĆĄ, V., Jarka, P., Laufek, F., JehliÄka, J., NÄmec, I., Strnad, L. (2010) Widenmannite, a rare uranyl lead carbonate: occurrence, formation and characterization. Mineralogical Magazine, 74 (1) 97-110 doi:10.1180/minmag.2010.074.1.97
Plasil, J., Palatinus, L., Rohlicek, J., Houdkova, L., Klementova, M., Golias, V., Skacha, P. (2014) Crystal structure of lead uranyl carbonate mineral widenmannite: Precession electron-diffraction and synchrotron powder-diffraction study. American Mineralogist, 99 (2) 276-282 doi:10.2138/am.2014.4671
Localities for Widenmannite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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).
All localities listed without proper references should be considered as questionable.
Czech Republic | |
| PlĂĄĆĄil et al. (2010) |
| Bull.N.M.Praha 2002 +1 other reference | |
| Lapis 2002 (7/8) |
| Möhn et al. (12/2021) | |
Finland | |
| Halls (2005) |
Germany (TL) | |
| Fleischer (1962) +3 other references |
| Stolze et al. (09/2020) |
Switzerland | |
| Meisser (2012) |
UK | |
| Elton et al. (1995) +1 other reference |
| Day (1999) |
USA | |
| Carlson et al. (2007) |
| Anné (2007) |
Quick NavTopAbout WidenmanniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Uranus Mine, KleinrĂŒckerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany