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Sklodowskite

A valid IMA mineral species - grandfathered
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Mg(UO2)2(SiO3OH)2 · 6H2O
Colour:
Light yellow to green-yellow
Lustre:
Adamantine, Vitreous, Silky
Hardness:
2 - 3
Specific Gravity:
3.54
Crystal System:
Monoclinic
Member of:
Sklodowskite Group
Name:
Named after Marie Skłodowska-Curie (7 November 1867, Warsaw, Russian Empire (now Poland) - 4 July 1934, Passy, Haute-Savoie, France) who, with her husband Pierre, was a pioneer in the study of radioactivity. She was given many awards including the 1903 Nobel Prize in Physics, and the 1911 Nobel Prize in Chemistry.

Type Locality:
ⓘShinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
Sklodowskite Group.


Unique Identifiers
First published:
1924
Type description reference:
Schoep, Alfred (1924) Sur la sklodowskite, un nouveau minéral uranifère ; ses analogies avec l'uranotile.Bulletin de Minéralogie, 47 (5) 162-172doi:10.3406/bulmi.1924.3946

Classification of Sklodowskite

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
Dana 8th ed.:
53.3.1.3

53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
3 : Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Hey's CIM Ref.:
14.16.9

14 : Silicates not Containing Aluminum
16 : Silicates of U

Mineral Symbols
Transparency:
Transparent, Translucent
Comment:
Earthy when massive
Colour:
Light yellow to green-yellow
Streak:
Yellow
Hardness:
2 - 3 onMohs scale
Cleavage:
Perfect
on {100}
Density:
3.54 g/cm3 (Measured)    3.51 g/cm3 (Calculated)

Optical Data of Sklodowskite
Surface Relief:
Moderate
Dispersion:
strong r > v
Pleochroism:
Visible
Comments:
X= colorless
Y= yellow
Z= pale yellow

Chemistry of Sklodowskite
Common Impurities:
Te,Ni,Na,K

Crystallography of Sklodowskite
General Appearance of Type Material:
Spherulites of fibers, 6-7 mm in diameter.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Uranium deposit; found in cracks in a talcose siliceous breccia.
Associated Minerals at Type Locality:
Kasolite
Reference:
Schoep, Alfred (1924) Sur la sklodowskite, un nouveau minéral uranifère ; ses analogies avec l'uranotile.Bulletin de Minéralogie, 47 (5) 162-172doi:10.3406/bulmi.1924.3946

Synonyms of Sklodowskite

Other Language Names for Sklodowskite

Relationship of Sklodowskite to other Species
Other Members of Sklodowskite Group:
CuprosklodowskiteCu(UO2)2(SiO3OH)2 · 6H2OTric.1 :P1
OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth.mmm(2/m2/m2/m) :Cmca

Common Associates9.AK.05Soddyite(UO2)2SiO4 · 2H2OOrth.mmm(2/m2/m2/m) :Fddd9.AK.10CuprosklodowskiteCu(UO2)2(SiO3OH)2 · 6H2OTric.1 :P19.AK.10OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth.mmm(2/m2/m2/m) :Cmca9.AK.15ParauranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2/m :P21/b9.AK.15UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 :P219.AK.15NatroboltwooditeNa(UO2)(SiO3OH) · H2OOrth. 222 :P2121219.AK.15KasolitePb(UO2)(SiO4) · H2OMon. 2/m :P21/b9.AK.15Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 :P219.AK.20Swamboite-(Nd)Nd0.333[(UO2)(SiO3OH)](H2O)~2.5Mon. 2/m :P21/b9.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OOrth.mmm(2/m2/m2/m) :Pbcn9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2OMon. 2/m :P2/b9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2OMon. 2/m :B2/m9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))Orth.mmm(2/m2/m2/m)9.AK.30Barronite(◻0.5Ba0.5)(UO2)2Si5O12(OH) · 2H2OMon. 2/m :B2/m9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O9.AK.35CalcioursiliteCa4(UO2)4(Si2O5)5(OH)6 · 15H2OOrth.9.AK.40UranosiliteUO3 · 7SiO2Orth.

Radioactivityshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield

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    • References for SklodowskiteⓘSan Sebastián depositAngelelli (1984)
    Australia
     
    Geosciences+1 other referenceEconomic Geology of Australia and papua ...Isobe et al. (1992)+1 other referenceGiblin (2005)Econ Geol (1987)+1 other reference
    Brazil
     
    Cassedanne et al. (1978)A.M.D.V. Chaves (2005)Pires et al. (2014)
    Canada
     
    Paul (1984)Knipping (1974)Watkinson et al. (1975)Rich et al. (1977)
    China
     
    Shen (n.d.)
    Czech Republic
     
    Pauliš P. et al. (Kutna Hora, issue 1)Lapis 2002 (7/8)Möhn et al. (12/2021)Sejkora et al. (2013)Bradna
    DR Congo (TL)
     
    Stohl et al. (1981)+1 other referenceKMMAKMMAKMMAMandarino (1997)Lhoest (1992)Wilson (2018)
    Egypt
     
    Hussein et al. (1988)Bisher (2012)
    France
     
    R. Pierrot- (1998)- (1998)Bariand et al. (1993)+2 other references
    Germany
     
    Kolitsch et al. (2019)Desor (04/2020)+1 other referenceFärber (n.d.)Weiß (1990)Dill et al. (2010)Aufschluss 69/ (7+8)+1 other referenceDesor (05/2020)King (n.d.)Gröbner et al. (2007)+1 other referenceWitzke et al. (1998)
    Greece
     
    analysed by Michalis Fitros - personal ...+3 other references
    Iran
     
    Iranmanesh et al. (2018)
    Japan
     
    Matsubara et al. (2013)
    Mexico
     
    Megaw (2023)Panczner (1987)
    New Zealand
     
    Christie et al. (2000)
    Poland
     
    Syczewski et al. (2023)+1 other referenceMochnacka et al. (2000)+1 other referenceSyczewski et al. (2023)
    Romania
     
    Hîrtopanu P. et al. (2004)
    Russia
     
    Eremin et al. (2023)
    Spain
     
    Arrufat et al. (2017)
    Switzerland
     
    Stalder et al. (1998)
    Tajikistan
     
    Pekov (1998)
    USA
     
    - (2008)+1 other referenceScarborough (1981)W. Wise - X-ray work at U.C. Santa ...Eckel et al. (1997)Travis Olds collectionNo reference known. Particularly NOT ...Northrop et al. (1996)NMBMMR Memoir 15 Geology and Technology ...Northrop et al. (1996)RRUFF R050445Patrick HaynesJensen (1978)Robinson et al. (2007)Lapham et al. (1976)USGS Prof Paper 455 p57+1 other referenceRichardson et al. (1993)Bullock (1981)Vochten et al. (2001)Bullock (1981)George E. Becraft and Paul L. Weis (1963)+1 other reference
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