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Soddyite

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Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
© Stephan Wolfsried

Show Soddyite Photos (40)
Formula:
(UO
 
2
)
 
2
SiO
 
4
·2H
 
2
O
System:OrthorhombicColour:Canary-yellow, ...
Hardness:3 - 4
Name:Named after Frederick Soddy (1877-1956), British physicist and radiochemist.
This page provides mineralogical data about Soddyite.

Classification of Soddyite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/B.36-10
Nickel-Strunz 10th (pending) edition ID:9.AK.05

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
Dana 8th edition ID: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)
Hey's CIM Ref.:14.16.3

14 : Silicates not Containing Aluminum
16 : Silicates of U
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Type Occurrence of Soddyite

Type Locality:Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1922

Physical Properties of Soddyite

Lustre: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
Maximum Birefringence:δ = 0.049 - 0.061

Chart 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:
(UO
 
2
)
 
2
SiO
 
4
·2H
 
2
O
Essential elements:H, O, Si, U
All elements listed in formula:H, O, Si, U

Relationship of Soddyite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.AK.10Cuprosklodowskite
Cu(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 6H
 
2
O
9.AK.10Oursinite
(Co,Mg)(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 6H
 
2
O
9.AK.10Sklodowskite
Mg(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
9.AK.15Boltwoodite
(K,Na)(UO
 
2
)[HSiO
 
4
] · 0.5H
 
2
O
9.AK.15Kasolite
Pb(UO
 
2
)[SiO
 
4
] · H
 
2
O
9.AK.15Natroboltwoodite
(H
 
3
O)(Na,K)UO
 
2
SiO
 
4
·H
 
2
O
9.AK.15Uranophane
Ca(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
9.AK.15Beta-Uranophane
9.AK.20Swamboite
UH
 
6
(UO
 
2
)
 
6
(SiO
 
4
)
 
6
·30H
 
2
O
9.AK.25Haiweeite
Ca(UO
 
2
)
 
2
[Si
 
5
O
 
12
(OH)
 
2
]·4.5H
 
2
O
9.AK.25Metahaiweeite
Ca(UO
 
2
)
 
2
Si
 
6
O
 
15
·nH
 
2
O
9.AK.25Ranquilite
9.AK.30Weeksite
K
 
2
(UO
 
2
)
 
2
(Si
 
2
O
 
5
)
 
3
·4H
 
2
O
9.AK.30Coutinhoite
Th
 
x
Ba
 
(1-2x)
(UO
 
2
)
 
2
Si
 
5
O
 
13
·(H
 
2
O)
 
1+y
 (0 < x < 0.5 and 0 < y < (2+x))
9.AK.35Ursilite
(Mg,Ca)
 
4
(UO
 
2
)
 
4
(Si
 
2
O
 
5
)
 
5.5
(OH)
 
5
·13H
 
2
O
9.AK.35Magnioursilite
Mg
 
4
(UO
 
2
)
 
4
(Si
 
2
O
 
5
)
 
5
(OH)
 
6
·20H
 
2
O
9.AK.35Calcioursilite
Ca
 
4
(UO
 
2
)
 
4
(Si
 
2
O
 
5
)
 
5
(OH)
 
6
·15H
 
2
O
9.AK.40Uranosilite
UO
 
3
 · 7SiO
 
2
Related Minerals - Hey's Index Grouping:

- +
14.16.1Uranosilite
UO
 
3
 · 7SiO
 
2
14.16.2Coffinite
(U,Th)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
14.16.4Swamboite
UH
 
6
(UO
 
2
)
 
6
(SiO
 
4
)
 
6
·30H
 
2
O
14.16.5Weeksite
K
 
2
(UO
 
2
)
 
2
(Si
 
2
O
 
5
)
 
3
·4H
 
2
O
14.16.6Boltwoodite
(K,Na)(UO
 
2
)[HSiO
 
4
] · 0.5H
 
2
O
14.16.7Natroboltwoodite
(H
 
3
O)(Na,K)UO
 
2
SiO
 
4
·H
 
2
O
14.16.8Cuprosklodowskite
Cu(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 6H
 
2
O
14.16.9Sklodowskite
Mg(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
14.16.10Uranophane
Ca(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
14.16.11β-Uranophane
Ca(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
14.16.12Haiweeite
Ca(UO
 
2
)
 
2
[Si
 
5
O
 
12
(OH)
 
2
]·4.5H
 
2
O
14.16.13Metahaiweeite
Ca(UO
 
2
)
 
2
Si
 
6
O
 
15
·nH
 
2
O
14.16.14Thorogummite
(Th,U)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
14.16.15Steacyite
([ ],K)(Na,Ca)
 
2
(Th,U)[Si
 
8
O
 
20
]
14.16.16Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
14.16.17Kasolite
Pb(UO
 
2
)[SiO
 
4
] · H
 
2
O
14.16.18 Orlite
Pb
 
3
(UO
 
2
)
 
3
(Si
 
2
O
 
7
)
 
2
·6H
 
2
O
14.16.19Oursinite
(Co,Mg)(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 6H
 
2
O

Other Names for Soddyite

Other Languages:
German:Soddyit
Russian:Соддиит
Spanish:Soddyita

Other Information

Health Warning:Contains uranium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.

References for Soddyite

Reference List:Comptes Rendu Académie des Sciences de la terres et des plantètes, Paris (1922), 174, 1066-1067.

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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Soddyite in the Natural History Museum (London) online catalogue
  • Soddyite details from Handbook of Mineralogy (PDF)
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    Localities for Soddyite

    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.
    Australia
     
    • Northern Territory
      • South Alligator Valley Mineral Field
    		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
          • Mt Painter area
            • Radium Ridge
    		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.
        • Lake George
    		[MinRec 1991]
    • Ontario
      • Algoma District
        • Blind River-Elliot Lake uranium district
    		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)
          • Ostrov
    		Lapis 2002(7/8), 63-65
      • Plzeň Region
        • Planá
    		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
        • Central area
          • Kambove
          • Shinkolobwe
    		C.R.Acad.Sci.Paris,(1922) 174, 1066-1067
          • Swambo
        • Southern area
          • Lubumbashi (Elizabethville)
        • Western area
          • Kolwezi
            • Kamoto
    		J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. V (2003)
    No reference listed
    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
    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
    • New Hampshire
      • Grafton Co.
        • Grafton
    		Clifford Frondel (1956) Mineral Composition of Gummite, American Mineralogist 41:539-568.
    • New Mexico
      • Cibola Co.
    		Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
    NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
      • Socorro Co.
    		Minerals of New Mexico 3rd ed.
    • Utah
      • Juab Co.
    • Wyoming
      • Fremont Co.
        • Gas Hills District
    		Handbook of Mineralogy
    Mineral and/or Locality
    Google
     
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