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Soddyite

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Formula:
(UO2)2SiO4 · 2H2O
System:
Orthorhombic
Colour:
Canary-yellow, ...
Hardness:
3 - 4
Name:
Named after Frederick Soddy (1877-1956), British physicist and radiochemist. See also: http://www.mindat.org/article.php/2163/Note+on+soddyite
This page provides mineralogical data about Soddyite.

Classification of Soddyite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.AK.05

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
53.3.3.1

53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
3 : Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
14.16.3

14 : Silicates not Containing Aluminum
16 : Silicates of U
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http://www.mindat.org/min-3702.html
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Type Occurrence of Soddyite

Year of Discovery:
1922

Physical Properties of Soddyite

Vitreous, Greasy, Dull
Diaphaneity (Transparency):
Transparent, Translucent, Opaque
Colour:
Canary-yellow, amber-yellow
Hardness (Mohs):
3 - 4

Crystallography of Soddyite

Crystal System:
Orthorhombic
Cell Parameters:
a = 8.32Å, b = 11.21Å, c = 18.71Å
Ratio:
a:b:c = 0.742 : 1 : 1.669
Unit Cell Volume:
V 1,745.03 ų (Calculated from Unit Cell)

Optical Data of Soddyite

Type:
Biaxial (-)
RI values:
nα = 1.650 - 1.654 nβ = 1.685 nγ = 1.699 - 1.715
Max Birefringence:
δ = 0.049 - 0.061
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively weak

Chemical Properties of Soddyite

Formula:
(UO2)2SiO4 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Soddyite to other Species

9.AK.10CuprosklodowskiteCu(UO2)2[HSiO4]2 · 6H2O
9.AK.10Oursinite(Co,Mg)(UO2)2[HSiO4]2 · 6H2O
9.AK.10SklodowskiteMg(UO2)2[HSiO4]2 · 5H2O
9.AK.15Boltwoodite(K,Na)(UO2)[HSiO4] · 0.5H2O
9.AK.15KasolitePb(UO2)[SiO4] · H2O
9.AK.15Natroboltwoodite(H3O)(Na,K)UO2SiO4 · H2O
9.AK.15Uranophane-βCa(UO2)2(HSiO4)2 · 5H2O
9.AK.15UranophaneCa(UO2)2[HSiO4]2 · 5H2O
9.AK.15Beta-Uranophane
9.AK.20SwamboiteUH6(UO2)6(SiO4)6 · 30H2O
9.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2O
9.AK.25Ranquilite
9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2O
9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))
9.AK.35Ursilite(Mg,Ca)4(UO2)4(Si2O5)5.5(OH)5 · 13H2O
9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O
9.AK.35CalcioursiliteCa4(UO2)4(Si2O5)5(OH)6 · 15H2O
9.AK.40UranosiliteUO3 · 7SiO2
14.16.1UranosiliteUO3 · 7SiO2
14.16.2Coffinite(U4+,Th)(SiO4)1-x(OH)4x
14.16.4SwamboiteUH6(UO2)6(SiO4)6 · 30H2O
14.16.5WeeksiteK2(UO2)2(Si5O13) · 4H2O
14.16.6Boltwoodite(K,Na)(UO2)[HSiO4] · 0.5H2O
14.16.7Natroboltwoodite(H3O)(Na,K)UO2SiO4 · H2O
14.16.8CuprosklodowskiteCu(UO2)2[HSiO4]2 · 6H2O
14.16.9SklodowskiteMg(UO2)2[HSiO4]2 · 5H2O
14.16.10UranophaneCa(UO2)2[HSiO4]2 · 5H2O
14.16.11Uranophane-βCa(UO2)2(HSiO4)2 · 5H2O
14.16.12HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
14.16.13MetahaiweeiteCa(UO2)2Si6O15 · nH2O
14.16.15Steacyite(◻,K)(Na,Ca)2(Th,U)[Si8O20]
14.16.16Ekanite(Ca,Fe2+,Pb)2(Th,U)[Si8O20]
14.16.17KasolitePb(UO2)[SiO4] · H2O
14.16.18OrlitePb3(UO2)3(Si2O7)2 · 6H2O
14.16.19Oursinite(Co,Mg)(UO2)2[HSiO4]2 · 6H2O

Other Names for Soddyite

Name in Other Languages:
German:Soddyit
Spanish:Soddyita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Soddyite

Reference List:
Schoep, A. (1922): La soddite, nouveau minéral radioactif. Comptes Rendus de l'Académie des Sciences de la terres et des plantètes, 174, 1066-1067. [as soddite]

American Mineralogist (1922): 7: 179.

American Mineralogist (1981): 66: 610-625.

Demartin, F., Gramaccioli, C.M., and Pilati, T. (1992) The importance of accurate crystal structure determination of uranium minerals. II. Soddyite (UO2)2(SiO4)·2H2O. Acta Crystallographica: C48: 1-4.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Soddyite

Specimens:
The following Soddyite specimens are currently listed for sale on minfind.com.

Localities for Soddyite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Argentina
 
E. Linares y R. O. Toubes (1960). Los minerales radiactivos de la República Argentina. Primeras Jornadas Geológigas Argentinas, 3, 191-205. San Juan.
E. Linares y R. O. Toubes (1960). Los minerales radiactivos de la República Argentina. Primeras Jornadas Geológigas Argentinas, 3, 191-205. San Juan.
E. Linares y R. O. Toubes (1960). Los minerales radiactivos de la República Argentina. Primeras Jornadas Geológigas Argentinas, 3, 191-205. San Juan.
E. Linares y R. O. Toubes (1960). Los minerales radiactivos de la República Argentina. Primeras Jornadas Geológigas Argentinas, 3, 191-205. San Juan.
Australia
 
  • Northern Territory
    • West Arnhem Region
      • South Alligator River
Henry, D.A., Pogson, R.E. and Williams, P.A. (2005) Threadgoldite from the South Alligator Valley uranium field, Northern Territory, Australia: second world occurrence. , Australian Journal of Mineralogy, 11, 7-11
Henry, D.A., Pogson, R.E. and Williams, P.A. (2005) Threadgoldite from the South Alligator Valley uranium field, Northern Territory, Australia: second world occurrence. , Australian Journal of Mineralogy, 11, 7-11
  • South Australia
    • Flinders Ranges
      • North Flinders Ranges
        • Arkaroola Region (Arkaroola Station)
          • Mt Painter area
2003, Brugger, J., Ansermet, S. & Pring, A. ' Uranium minerals from Mt Painter, Northern Flinders ranges, South Australia' Australian Journal of Mineralogy, vol. 9, n°1, pp 15-31
Canada
 
  • New Brunswick
    • York Co.
      • Prince William Parish
        • Lake George
[MinRec 1991]; WILSON, W.E. (1991) The Lake George antimony mine, New Brunswick. Mineralogical Record 22, 263-267.
  • Ontario
    • Algoma District
      • Elliot Lake area
Robertson, J.A. (1976) The Blind River Uranium Deposits: the ores and their setting. (Ontario Division of Mines, Miscellaneous paper 65)
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
    • Plzeň Region
      • Planá u Mariánských Lázní (Plan)
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
Democratic Republic of Congo (Zaïre)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Kambove District
      • Kolwezi District
        • Kamoto
J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. V (2003)
Deliens, Michel (1992): Occurrence de roubaultite à Kamoto (Shaba, Zaïre). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. 58, 295-296.
        • Kolwezi
No reference listed
      • Lubumbashi (Elizabethville)
      • Shinkolobwe
C.R.Acad.Sci.Paris,(1922) 174, 1066-1067
      • Swambo
Christophe Boutry and Vic Sapienza specimens
Egypt
 
  • Red Sea Governorate
    • Eastern Desert
      • Sikait-Zabara region
Yehia H. Dawood (2011) Mineral Chemistry and Genesis of Uranyl Minerals Associated with Psammitic Gneisses, Abu Rusheid Area, South Eastern Desert of Egypt. JKAU: Earth Sci., Vol. 21, No. 1, pp: 137-169
France
 
  • Languedoc-Roussillon
    • Hérault
      • Lodève
[Le Cahier des Micromonteurs, 1998, 2, p.13-26]
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Saxony
    • Erzgebirge
      • Johanngeorgenstadt District
Wittern: "Mineralfundorte in Deutschland", 2001
    • Vogtland
      • Oelsnitz
Wittern: "Mineralfundorte in Deutschland", 2001
Italy
 
  • Sardinia
    • Cagliari Province
      • Capoterra
Olmi F., Sabelli C., Senesi F., Stara P., 2002. La mineralizzazione uranifera di Arcu su Linnarbu. Riv. Miner. Ital., 3: 148-169.
Japan
 
  • Honshu Island
    • Kinki Region
      • Shiga Prefecture
Matsubara and Miyawaki (2006) Catalogue of Japanese Minerals.
Mexico
 
  • Chihuahua
    • Mun. de Aldama
      • Peña Blanca District
        • Sierra Peña Blanca
http://www.swri.org/4org/d20/ghs/PBlanca/mineral.html; Wong, V., Goodell, P. C., & Anthony, E. Y. (1999, January). Characterization of U-series disequilibria at the Pena Blanca natural analogue site, Chihuahua, Mexico. In MRS Proceedings (Vol. 556, p. 801). Cambridge University Press.
Russia
 
  • Northern Region
    • Karelia Republic
      • Northern Karelia
P.M. Kartashov data
USA
 
  • Arizona
    • Yavapai Co.
Frondel, C. (1958), Systematic Mineralogy of uranium and thorium, USGS Bull. 1064: 315; Grant, Raymond W., Richard A. Bideaux & Sidney A. Williams (2006), Minerals Added to the Arizona List 1995 to 2005: 8.
  • Colorado
    • Park Co.
      • Lake George (Badger Flats) Area
Minerals of Colorado (1997) Eckels, E. B.
    • Saguache Co.
      • Marshall Pass District
Minerals of Colorado (1997) Eckel, E. B.; Am Min 50:909-923
  • Georgia
    • Lamar Co.
      • Barnesville
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92
  • Nevada
    • Humboldt Co.
NBMG Spec. Pub. 31 Minerals of Nevada; Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell
  • New Hampshire
    • Grafton Co.
      • Grafton
Clifford Frondel (1956) Mineral Composition of Gummite, American Mineralogist 41:539-568.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
  • New Mexico
    • Cibola Co.
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
    • Socorro Co.
Minerals of New Mexico 3rd ed.
McLemore, Virginia T., Zimmerer, Matthew, (2009) Magmatic activity and mineralization along the Capitan, Santa Rita, and Morenci lineaments in the Chupadera Mesa area, central New Mexico. New Mexico Geological Society Fall Field Conference Guidebook – 60 Geology of the Chupadera Mesa pp. 375-386
  • Utah
    • Juab Co.
USGS Prof Paper 455A p57
  • Wyoming
    • Fremont Co.
      • Gas Hills District
Handbook of Mineralogy
Mineral and/or Locality  
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