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Widenmannite

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About WidenmanniteHide

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 ('Württembergischer Bergrat') who, in 1793, first reported on the occurrence of an uranium mica in the Black Forest.
This page provides mineralogical data about Widenmannite.


Classification of WidenmanniteHide

Approved
Approval Year:
1974
5.ED.40

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
14.1.5.1

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
11.11.19

11 : Carbonates
11 : Carbonates of Cr and U

Physical Properties of WidenmanniteHide

Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Yellow, very pale greenish yellow, colorless
Streak:
Pale yellow
Hardness:
Cleavage:
Perfect
on {010}
Density:
6.89 g/cm3 (Calculated)

Optical Data of WidenmanniteHide

Type:
Biaxial (-)
RI values:
nα = 1.803 nβ = 1.905 nγ = 1.945
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.
Surface Relief:
Very High
Dispersion:
r > v extreme

Chemical Properties of WidenmanniteHide

Formula:
Pb2(OH)2[(UO2)(CO3)2]

Originally assumed to be Pb2(UO2)(CO3)3.

Crystallography of WidenmanniteHide

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 ų (Calculated from Unit Cell)
Morphology:
Lath-like crystals in tufts and mats

Type Occurrence of WidenmanniteHide

Geological Setting of Type Material:
Oxidation zone hydrothermal As-Pb deposit

Synonyms of WidenmanniteHide

Other Language Names for WidenmanniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cerussite2 photos of Widenmannite associated with Cerussite on mindat.org.
Kasolite1 photo of Widenmannite associated with Kasolite on mindat.org.
Quartz1 photo of Widenmannite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.ED.05BayleyiteMg2(UO2)(CO3)3 · 18H2OMon.
5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2OMon. 2/m : P21/m
5.ED.15AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2OTric. 1 : P1
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2OOrth. mm2
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2OMon.
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2OTrig. 3 : R3
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2OHex.
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2OOrth.
5.ED.50ČejkaiteNa4(UO2)(CO3)3Tric.
5.ED.50AgricolaiteK4(UO2)(CO3)3Mon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.11.1StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
11.11.2Rutherfordine(UO2)CO3Orth. mm2 : Imm2
11.11.3Joliotite(UO2)CO3 · nH2OOrth.
11.11.4GrimseliteK3Na(UO2)(CO3)3 · H2OHex.
11.11.5BayleyiteMg2(UO2)(CO3)3 · 18H2OMon.
11.11.6MetazelleriteCa(UO2)(CO3)2 · 3H2OOrth.
11.11.7ZelleriteCa(UO2)(CO3)2 · 5H2OOrth.
11.11.8WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2OOrth.
11.11.9UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2OOrth.
11.11.10SharpiteCa(UO2)3(CO3)4 · 3H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
11.11.11VogliteCa2Cu(UO2)(CO3)4 · 6H2OMon.
11.11.12AndersoniteNa2Ca(UO2)(CO3)3 · 6H2OTrig. 3 : R3
11.11.13SwartziteMgCa(UO2)(CO3)3 · 12H2OMon. 2/m : P21/m
11.11.14RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2OMon.
11.11.15Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2OMon. 2/m
11.11.16Shabaite-(Nd)Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O
11.11.17Astrocyanite-(Ce)Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2OHex.
11.11.18Bijvoetite-(Y)Y8(UO2)16(CO3)16O8(OH)8 · 39H2OMon.
11.11.20ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2OOrth.

Fluorescence of WidenmanniteHide

Non-fluorescent.

Other InformationHide

Health Risks:
Radioactive

References for WidenmanniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1962): 47: 415.
Walenta, K. (1976): Widenmannit und Joliotit, zwei neue Uranylkarbonatmineralien aus dem Schwarzwald. Schweiz. Mineral. Petrog. Mitt., 56, 167-185 (in German with English abs.).
Mineralogical Magazine (1995): 59: 745-749.
J. Plásil, J. Cejka, J. Sejkora, P. Skácha, V. Goliás, P. Jarka, F. Laufek, J. Jehlicka, I. Nemec, and L. Strnad (2010): Widenmannite, a rare uranyl lead carbonate: occurrence, formation and characterization. Mineral. Mag. 74, 97-110.
J. Plášil, L. Palatinus, J. Rohlíček, L. Houdková, M. Klementová, V. Goliáš, P. Škácha (2014): Crystal structure of lead uranyl carbonate mineral widenmannite: Precession electron-diffraction and synchrotron powder-diffraction study. Am. Mineral. 99, 276-282.

Internet Links for WidenmanniteHide

Localities for WidenmanniteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Central Bohemia Region
    • Příbram
      • Březové Hory ore region (Birkenberg)
        • Březové Hory deposit
J. Plásil, J. Cejka, J. Sejkora, P. Skácha, V. Goliás, P. Jarka, F. Laufek, J. Jehlicka, I. Nemec, and L. Strnad (2010): Widenmannite, a rare uranyl lead carbonate: occurrence, formation and characterization. Mineralogical Magazine 74, 97-110.
Bull.N.M.Praha 2002, 10, pp. 43-77; Vajdak, Josef (2006) Mineral News: 22: 4.
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
Finland
 
  • Lapland Region
    • Salla
Halls, Ch. (2005): Report on the mineralogy of a sample from the Agricola Resources Energy Ridge project, Hautuajaervi, Lapin Laani, Finland. Final Reprot, Dept. of Mineralogy, NHM, London, 1-24. [cited in Plásil et al. (2010)]
Germany (TL)
 
  • Baden-Württemberg
    • Black Forest
      • Lahr
        • Reichenbach
          • Weiler
Am. Min., 47, 415 (1962); Schw. MPM 56 (1976), 167; Walenta: "Die Mineralien des Schwarzwaldes", Weise (1992)
Switzerland
 
  • Wallis (Valais)
    • Collonges
      • Plex
Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
UK
 
  • England
    • Cornwall
      • St Just
        • Botallack
[Journal of the Russell Society, 6(1), 17-26 (1995)]
  • Scotland
    • Dumfries and Galloway
      • Needle's Eye
BMS Database
USA
 
  • Michigan
    • Baraga Co.
      • Huron River
Rocks & Minerals 82:298-308
Mineral and/or Locality  
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