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Sklodowskite

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Marie Skłodowska Curie
Formula:
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
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.

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Classification of SklodowskiteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.AK.10

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
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)
14.16.9

14 : Silicates not Containing Aluminum
16 : Silicates of U

Physical Properties of SklodowskiteHide

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

Optical Data of SklodowskiteHide

Type:
Biaxial (+)
RI values:
nα = 1.613 - 1.615 nβ = 1.635 - 1.642 nγ = 1.656 - 1.657
Max Birefringence:
δ = 0.043
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong r > v
Pleochroism:
Visible
Comments:
X= colorless
Y= yellow
Z= pale yellow

Chemical Properties of SklodowskiteHide

Formula:
Mg(UO2)2(SiO3OH)2 · 6H2O
Common Impurities:
Te,Ni,Na,K

Crystallography of SklodowskiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 17.382(6) Å, b = 7.047(1) Å, c = 6.610(2) Å
β = 105.88°
Ratio:
a:b:c = 2.467 : 1 : 0.938
Unit Cell V:
778.77 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Acicular crystals
Twinning:
With {001} or {100} as twin plane

Type Occurrence of SklodowskiteHide

Synonyms of SklodowskiteHide

Other Language Names for SklodowskiteHide

Simplified Chinese:硅镁铀矿
Spanish:Sklodowskita
Traditional Chinese:矽鎂鈾礦

Relationship of Sklodowskite to other SpeciesHide

Other Members of this group:
CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cuprosklodowskite14 photos of Sklodowskite associated with Cuprosklodowskite on mindat.org.
Calcite6 photos of Sklodowskite associated with Calcite on mindat.org.
Gypsum6 photos of Sklodowskite associated with Gypsum on mindat.org.
Uranophane5 photos of Sklodowskite associated with Uranophane on mindat.org.
Uraninite4 photos of Sklodowskite associated with Uraninite on mindat.org.
Torbernite3 photos of Sklodowskite associated with Torbernite on mindat.org.
Kasolite2 photos of Sklodowskite associated with Kasolite on mindat.org.
Nováčekite-I2 photos of Sklodowskite associated with Nováčekite-I on mindat.org.
Vandenbrandeite2 photos of Sklodowskite associated with Vandenbrandeite on mindat.org.
Malachite2 photos of Sklodowskite associated with Malachite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AK.05Soddyite(UO2)2SiO4 · 2H2OOrth.
9.AK.10CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
9.AK.10OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca
9.AK.15Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
9.AK.15KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
9.AK.15NatroboltwooditeNa(UO2)(SiO3OH) · H2O
9.AK.15Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.
9.AK.15UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
9.AK.15Beta-UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
9.AK.20Swamboite-(Nd)Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5Mon.
9.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OMon.
9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2O
9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2OOrth.
9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))Orth.
9.AK.35UrsiliteMg4(UO2)4(Si2O5)5.5(OH)5 · 13H2OOrth.
9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O
9.AK.35CalcioursiliteCa4(UO2)4(Si2O5)5(OH)6 · 15H2O
9.AK.40UranosiliteUO3 · 7SiO2Orth.

Related Minerals - Dana Grouping (8th Ed.)Hide

53.3.1.1KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
53.3.1.2UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
53.3.1.4CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
53.3.1.5Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
53.3.1.6NatroboltwooditeNa(UO2)(SiO3OH) · H2O
53.3.1.7OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca
53.3.1.8Swamboite-(Nd)Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5Mon.
53.3.1.9Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.16.1UranosiliteUO3 · 7SiO2Orth.
14.16.2Coffinite(U4+,Th)(SiO4)1-x(OH)4xTet.
14.16.3Soddyite(UO2)2SiO4 · 2H2OOrth.
14.16.4Swamboite-(Nd)Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5Mon.
14.16.5WeeksiteK2(UO2)2(Si5O13) · 4H2OOrth.
14.16.6Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
14.16.7NatroboltwooditeNa(UO2)(SiO3OH) · H2O
14.16.8CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
14.16.10UranophaneCa(UO2)2(SiO3OH)2 · 5H2OMon. 2 : P21
14.16.11Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon.
14.16.12HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OMon.
14.16.13MetahaiweeiteCa(UO2)2Si6O15 · nH2O
14.16.15SteacyiteK0.3(Na,Ca)2ThSi8O20Tet. 4/mmm (4/m 2/m 2/m) : P4/mcc
14.16.16EkaniteCa2ThSi8O20Tet. 4 2 2 : I4 2 2
14.16.17KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
14.16.18OrlitePb3(UO2)3(Si2O7)2 · 6H2O
14.16.19OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca

Other InformationHide

Health Risks:
Radioactive

References for SklodowskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schoep, A. (1924) La Sklodowskite, nouveau minéral radioactif. Comptes rendu de l’Académie des sciences de Paris: 179: 413.
Foshag, W.F. (1925) New mineral names. American Mineralogist: 10: 132.
Gorman, D.H. (1957) Studies of radioactive compounds; IX, Sklodowskite. Canadian Mineralogist: 6: 52-60.
Mokeeva, V.I. (1964) The structure of sklodowskite. Soviet Physics - Crystallography: 9: 217-218.
Ryan, R.R., Rosenzweig, A. (1977) Sklodowskite, MgO.2UO3.2SiO2.7H2O. Crystal Structure Communications: 6: 611-615.
Stohl, F.V., Smith, D.K. (1981) The crystal chemistry of the uranyl silicate minerals. American Mineralogist: 66: 615-625.
Burns, P.C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for SklodowskiteHide

Localities for SklodowskiteHide

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.
Australia
 
  • Northern Territory
    • Coomalie Shire
      • Batchelor
        • Rum Jungle
D A Berkman (1968) The geology of the Rum Jungle Uranium Deposits. Symposium on Uranium Deposits in Australia 1968 pp.12-31; Geosciences, Museums Victoria
    • West Arnhem Region
      • Kakadu
Economic Geology of Australia and papua New Guinea pp321-326
Angela Giblin (2004) Alligator Rivers Uranium deposits (Koongarra, Nabarlek and Ranger One) Northern Territory. CRC LEME; Isobe, H., Murakami, T., & Ewing, R. C. (1992). Alteration of uranium minerals in the Koongarra deposit, Australia: Unweathered zone. Journal of Nuclear Materials, 190, 174-187.
Econ Geol (1987)82:1152-1168; Angela Giblin (2004) Alligator Rivers Uranium deposits (Koongarra, Nabarlek and Ranger One) Northern Territory. CRC LEME
Brazil
 
  • Bahia
    • Brumado (Bom Jesus dos Meiras)
      • Serra das Éguas
Cassedanne, J.P. & Cassedanne, J.O. (1978): Famous mineral localities: The Brumado district, Bahia , Brazil. Mineralogical Record 9 : 196-205
    • Lagoa Real U province
A.M.D.V. Chaves (2005) Mineralogia e Geoquímica Supergênicas do Urânio - Província Uranífera de Lagoa Real, Caetité-Bahia. Dissertação de Mestrado, Comissão Nacional de Energia Nuclear, 101p. (In portuguese with abstract in english)
Canada
 
  • Saskatchewan
    • Athabasca Basin
WATKINSON, D.H., HESLOP, J.B. & EWERT, W.D. (1975) Nickel sulphide-arsenide assemblages associated with uranium mineralization, Zimmer Lake area, Northern Saskatchewan. Canadian Mineralogist 13, 198-204.
China
Shuling Zhang, Gong Chen, and Yuheng Tang (1984): Acta Sedimentologica Sinica 2(4)
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
            • Svornost Mine (Einigkeit Mine)
Jiří Sejkora, Jakub Plášil & Bohuslav Bureš (2013): Neobvyklá asociaci supergenních minerálů uranu ze žíly Jan Evangelista, Jáchymov (Česká republika). [Unusual association of supergene uranium minerals from the Jan Evangelista vein, Jáchymov (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 143-156
    • Liberec Region
      • Harrachov (Harrachsdorf)
Bradna, J., Šita, F.: Nálezy minerál na Rýžovišti u Harrachova. Opera Corcontica, 1968, 5, s. 246-247.
Democratic Republic of Congo (Zaïre) (TL)
 
  • Katanga (Shaba)
    • Kambove District
      • Shinkolobwe
Am Min 66 (1981), 610
    • Kolwezi District
      • Kamoto
S. Wolfsried collection
      • Kolwezi
No reference listed
    • Lubumbashi (Elizabethville)
France
 
  • Brittany
    • Morbihan
      • Berné
R. Pierrot, L. Chauris, C. Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
      • Guern
Le Règne Minéral, Hors Série IV (1998)
  • Occitanie
    • Hérault
      • Lodève
[Le Règne Minéral 1997, 13, p.5-18]; Bariand, P., Bachet, B., Brassy, C., Medenbach, O., Deliens, M., Vautier, R., & Piret, P. (1993) A New Uranium Mineral from the Talmessi Mine, Iran, and Rabejac, France. Mineralogical Record: 24: 463-467
Le Règne Minéral, Hors Série IV (1998)
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Wolfach
        • Oberwolfach
          • Rankach valley
Uwe Kolitsch (to be published; https://www.mineralienatlas.de/forum/index.php/topic,40632.msg303314.html#msg303314)
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Weißenstadt
          • Großschloppen
Gunnar Färber
    • Upper Palatinate
      • Wölsendorf Fluorite Mining District
        • Wölsendorf East District
          • Schwarzach bei Nabburg
            • Wölsendorf
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Rhineland-Palatinate
    • Hunsrück
      • Birkenfeld
        • Ellweiler
Aufschluss 69/(7+8), Lapis 79/(7+8)
  • Saxony
    • Vogtland
      • Oelsnitz
Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Paleokamariza area
          • Paleokamariza Mines
Analysed by Michalis Fitros - personal communication to Gerhard Brandstetter; Simon, P. & Kapellas, K. (2017): Uranmineralien und rote Barytkristalle: Erstfund von Sklodowskit in Lavrion, Griechenland. Lapis, 42 (7-8), 58-65.
Japan
 
  • Honshu Island
    • Tohoku Region
      • Fukushima Prefecture
Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., & Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bull. Natl. Mus. Nat. Sci., Ser. C, 39, pp. 1–6
Mexico
 
  • Chihuahua
    • Mun. de Aquiles Serdán
      • Santa Eulalia District
        • West Camp
          • Francisco Portillo
Panczner(1987):220 & 284.
New Zealand
 
  • South Island
    • Buller River
Christie & Brathwaite, (2000) NZ Mineral Commodity Report 19 - Beryllium, Gallium, Lithium, Magnesium, Uranium and Zirconium
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Jelenia Góra District
      • Kowary area
Mochnacka, K., Banaś, M. (2000): Occurrence and genetic relationships of uranium and thorium mineralization in the Karkonosze-Izera Block (The Sudety Mts, SW Poland). Annales Societatis Geologorum Poloniae: 70: 137-150
Romania
 
  • Suceava Co.
    • Suceava district
Hîrtopanu P., Udubaşa G., Scott P., Hârtopanu I. (2004) Uranium sulphide mineralisation in the Bistriţa Mts., East Carpathians, Romania. Romanian Journal of Mineral Deposits 81:108-111
Spain
 
  • Andalusia
    • Almería
      • Sierra Alhamilla
        • Pechina
          • Barranco Hondo
Arrufat, L., Alías, M.A., Guillén, F. y Rosillo, J.F. (2017) Revisión sobre la Presencia de Minerales de Uranio en Almería: Determinación de Sklodowskita, Macla (22), 14-15.
Switzerland
 
  • Wallis (Valais)
    • Le Trient Valley
      • Les Marécottes
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 374.
Tajikistan
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Khodzhent (Leninabad)
      • Kyzyltyube-Sai
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • Alaska
    • Prince of Wales-Outer Ketchikan Borough
      • Ketchikan District
        • Prince of Wales Island
          • Bokan Mountain
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
  • California
    • San Bernardino Co.
      • Bristol Mts
        • Amboy area
W. Wise - X-ray work at U.C. Santa Barbara
  • Colorado
    • Saguache Co.
      • Marshall Pass District
Minerals of Colorado (1997) E.B. Eckels
  • Michigan
    • Gogebic Co.
      • Watersmeet
Travis Olds collection
  • New Hampshire
    • Grafton Co.
      • Grafton
No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."
  • New Mexico
    • Cibola Co.
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
    • McKinley Co.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    • Sierra Co.
RRUFF R050445
    • Socorro Co.
      • San Lorenzo District
Patrick Haynes
  • New York
    • Essex Co.
      • Crown Point Township
Jensen (1978) Minerals of New York State
George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.
  • Pennsylvania
    • Carbon Co.
      • Jim Thorpe (Mauch Chunk)
Geyer, A.R., Smith, R.C. & Barnes, J.H. (1976) Mineral Collecting in Pennsylvania.
  • Utah
    • Juab Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah; USGS Prof Paper 455 p57
Rocks & Minerals: 68(6): 381-393.
    • Piute Co.
      • Marysvale District (Marysvale Uranium area)
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • San Juan Co.
      • White Canyon District
        • White Canyon
Can Min (2001) 39, 6, 1685-1689
    • Wayne Co.
      • Fremont District
        • Fruita
UGMS Bull 117 Minerals and Mineral Localities of Utah
  • Washington
    • Stevens Co.
      • Spokane Indian Reservation
        • Wellpinit
Cannon, B. (1975): Minerals of Washington, p.53; George E. Becraft and Paul L. Weis (1963) Geology and mineral deposits of the Turtle Lake quadrangle, Washington. USGS Bulletin 1131
Mineral and/or Locality  
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