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Widenmannite

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Prokop Mine, Březové Hory deposit, Březové Hory (Birkenberg), Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Formula:
Pb
 
2
(UO
 
2
)[CO
 
3
]
 
3
System:OrthorhombicColour:Yellow, very pale ...
Hardness:2
Name:Named after Johann Friedrich Wilhelm Widenmann (1764-1798), German mineralogist.
This page provides mineralogical data about Widenmannite.

Classification of Widenmannite

IMA status:Approved 1974
Strunz 8th edition ID:5/F.07-10
Nickel-Strunz 10th (pending) edition ID:5.ED.40

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
Dana 8th edition ID:14.1.5.1

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
Hey's CIM Ref.:11.11.19

11 : Carbonates
11 : Carbonates of Cr and U
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Type Occurrence of Widenmannite

Type Locality:Michael Mine, Weiler, Reichenbach, Lahr, Black Forest, Baden-Württemberg, Germany
Year of Discovery:1961
Geological Setting of type material:Oxidation zone hydrothermal As-Pb deposit

Physical Properties of Widenmannite

Lustre:Silky, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Colour:Yellow, very pale greenish yellow, colorless
Streak:Pale yellow
Hardness (Mohs):2
Cleavage:Perfect
on {010}
Density (calculated):6.89 g/cm3

Crystallography of Widenmannite

Crystal System:Orthorhombic
Cell Parameters:a = 8.99Å, b = 9.36Å, c = 4.95Å
Ratio:a:b:c = 0.96 : 1 : 0.529
Unit Cell Volume:V 416.52 ų (Calculated from Unit Cell)
Morphology:Lath-like crystals in tufts and mats

Optical Data of Widenmannite

Type:Biaxial (-)
RI values: nα = 1.803 nβ = 1.905 nγ = 1.945
2V:Measured: 63° , Calculated: 60°
Maximum Birefringence:δ = 0.142

Chart 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 Widenmannite

Formula:
Pb
 
2
(UO
 
2
)[CO
 
3
]
 
3
Essential elements:C, O, Pb, U
All elements listed in formula:C, O, Pb, U

Relationship of Widenmannite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.ED.05Bayleyite
Mg
 
2
(UO
 
2
)[CO
 
3
]
 
3
 · 18H
 
2
O
5.ED.10Swartzite
MgCa(UO
 
2
)[CO
 
3
]
 
3
 · 12H
 
2
O
5.ED.15Albrechtschraufite
Ca
 
4
Mg(UO
 
2
)
 
2
[F
 
2
|(CO
 
3
)
 
6
] · 17 H
 
2
O
5.ED.20Liebigite
Ca
 
2
(UO
 
2
)[CO
 
3
]
 
3
 · 11H
 
2
O
5.ED.25Rabbittite
Ca
 
3
Mg
 
3
(UO
 
2
)
 
2
[(OH)
 
4
|(CO
 
3
)
 
6
] · 18H
 
2
O
5.ED.30Andersonite
Na
 
2
Ca(UO
 
2
)[CO
 
3
]
 
3
 · 6H
 
2
O
5.ED.35Grimselite
K
 
3
Na(UO
 
2
)[CO
 
3
]
 
3
 · H
 
2
O
5.ED.45Znucalite
Zn
 
12
Ca(UO
 
2
)[(OH)
 
22
|(CO
 
3
)
 
3
] · 4H
 
2
O
5.ED.50Čejkaite
Na
 
4
(UO
 
2
)(CO
 
3
)
 
3
Related Minerals - Hey's Index Grouping:

- +
11.11.1Stichtite
Mg
 
6
Cr
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
11.11.2Rutherfordine
(UO
 
2
)[CO
 
3
]
11.11.3Joliotite
(UO
 
2
)[CO
 
3
] · nH
 
2
O
11.11.4Grimselite
K
 
3
Na(UO
 
2
)[CO
 
3
]
 
3
 · H
 
2
O
11.11.5Bayleyite
Mg
 
2
(UO
 
2
)[CO
 
3
]
 
3
 · 18H
 
2
O
11.11.6Metazellerite
Ca(UO
 
2
)[CO
 
3
]
 
2
 · 3H
 
2
O
11.11.7Zellerite
Ca(UO
 
2
)[CO
 
3
]
 
2
 · 5H
 
2
O
11.11.8Wyartite
Ca[U
5+
 
(UO
 
2
)
 
2
(CO
 
3
)O
 
4
(OH)](H
 
2
O)
 
7
11.11.9Urancalcarite
Ca(UO
 
2
)
 
3
[(OH)
 
6
|CO
 
3
] · 3H
 
2
O
11.11.10Sharpite
Ca(UO
 
2
)
 
6
[(OH)
 
4
|(CO
 
3
)
 
5
] · 6H
 
2
O
11.11.11Voglite
Ca
 
2
Cu(UO
 
2
)[CO
 
3
]
 
4
 · 6H
 
2
O (?)
11.11.12Andersonite
Na
 
2
Ca(UO
 
2
)[CO
 
3
]
 
3
 · 6H
 
2
O
11.11.13Swartzite
MgCa(UO
 
2
)[CO
 
3
]
 
3
 · 12H
 
2
O
11.11.14Rabbittite
Ca
 
3
Mg
 
3
(UO
 
2
)
 
2
[(OH)
 
4
|(CO
 
3
)
 
6
] · 18H
 
2
O
11.11.15Kamotoite-(Y)
Y
 
2
(UO
 
2
)
 
4
[O
 
4
|(CO
 
3
)
 
3
] · 14H
 
2
O
11.11.16Shabaite-(Nd)
Ca(Nd,Sm,Y)
 
2
(UO
 
2
)[(OH)
 
2
|(CO
 
3
)
 
4
] · 6H
 
2
O
11.11.17Astrocyanite-(Ce)
Cu
 
2
(Ce,Nd,La)
 
2
(UO
 
2
)[(OH)
 
2
|(CO
 
3
)
 
5
] · 1.5H
 
2
O
11.11.18Bijvoetite-(Y)
(Y,Dy)
 
2
(UO
 
2
)
 
4
[(OH)
 
6
|(CO
 
3
)
 
4
] · 11H
 
2
O
11.11.20Znucalite
Zn
 
12
Ca(UO
 
2
)[(OH)
 
22
|(CO
 
3
)
 
3
] · 4H
 
2
O

Other Names for Widenmannite

Synonyms:
IMA1974-008
Other Languages:
German:Widenmannit
Spanish:Widenmannita

Other Information

Health Warning:Radioactive

References for Widenmannite

Reference List:American Mineralogist (1962): 47: 415.

Mineralogical Magazine (1995): 59: 745-749.

Schweizerische mineralogische und petrographische Mitteilungen (1976): 56: 175.

Internet Links for Widenmannite

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  • Raman and XRD data at RRUFF project
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  • Widenmannite details from Handbook of Mineralogy (PDF)
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    Localities for Widenmannite

    Hide Locality List
    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Příbram
          • Březové Hory (Birkenberg)
            • Březové Hory deposit
    		Bull.N.M.Praha 2002, 10, pp. 43-77; Vajdak, Josef (2006) Mineral News: 22: 4.
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Ostrov
    		Lapis 2002(7/8), 63-65
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Lahr
          • Reichenbach
            • Weiler
    		Am. Min., 47, 415 (1962); Schw. MPM 56 (1976), 167; Walenta: "Die Mineralien des Schwarzwaldes", Weise (1992)
    UK
     
    • England
      • Cornwall
        • St Just District
          • Botallack - Pendeen Area
            • Botallack
    		[Journal of the Russell Society, 6(1), 17-26 (1995)]
    • Scotland
      • Dumfries & Galloway (Kirkcudbrightshire)
        • Needle's Eye
    		BMS Database
    USA
     
    • Michigan
      • Baraga Co.
        • Huron River
    		Rocks & Minerals 82:298-308
    Mineral and/or Locality
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