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soddyite

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Journal Article
Published: 01 January 2011
American Mineralogist (2011) 96 (1): 202–206.
... the alteration of dehydrated schoepite, UO 3 (H 2 O), and soddyite, [(UO 2 ) 2 (SiO 4 )](H 2 O) 2 , in the presence of aqueous solutions containing hydrogen peroxide. Crystalline samples were reacted with various concentrations of hydrogen peroxide and the resulting material was analyzed by powder X-ray...
FIGURES | View All (4)
Journal Article
Published: 01 November 2007
American Mineralogist (2007) 92 (11-12): 1946–1951.
...Amanda L. Klingensmith; Peter C. Burns Abstract Alteration of spent nuclear fuel in a geological repository under oxidizing conditions may result in uranyl compounds and incorporation of Np-237 into uranyl alteration phases could impact repository performance. Powders of synthetic soddyite, (UO 2...
FIGURES | View All (5)
Journal Article
Published: 01 June 1952
American Mineralogist (1952) 37 (5-6): 386–393.
...D. H. Gorman Abstract New observations are made on the rare uranium silicate mineral soddyite. The formula 5UO 3 ·2SiO 2 )·6H 2 O is established as the most plausible. New crystallographic data are recorded: orthorhombic, a = 8.32, b = 11.21, c =18.71 A; space group Fddd . Powder data are presented...
Image
Bipyramidal orange crystals of <b>soddyite</b> with long-prismatic crystals of rut...
Published: 01 March 2018
Fig. 10 Bipyramidal orange crystals of soddyite with long-prismatic crystals of rutherfordine. Shinkolobwe mine, Congo, Africa. FOV 2.5 mm (photo P. Škácha).
Image
The O 1 s  spectra of uranophane, uranophane-β and <b>soddyite</b>. The assignment...
Published: 01 January 2014
Figure 15 The O 1 s spectra of uranophane, uranophane-β and soddyite. The assignment of peaks is given at the top of the Figure. The Figure is modified after Schindler et al. (2009b) .
Image
The U 4 f  7&#x2F;2  spectra of liebigite, uranophane, uranophane-β, <b>soddyite</b> an...
Published: 01 January 2014
Figure 16 The U 4 f 7/2 spectra of liebigite, uranophane, uranophane-β, soddyite and metatorbernite. The peak assignments are provided in Figure 16A. The Figure is modified after Schindler et al. (2009a) .
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Summary of results for alteration of <b>soddyite</b> to studtite. All of the start...
Published: 01 January 2011
F igure 2. Summary of results for alteration of soddyite to studtite. All of the starting material altered to studtite in the presence of 0.1 M H 2 O 2 .
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Results of analyses for powders of <b>soddyite</b> vs. synthesis temperature. Squa...
Published: 01 November 2007
F igure 2. Results of analyses for powders of soddyite vs. synthesis temperature. Squares represent data for samples washed with hot water, whereas diamonds are for powders that were also washed using acetic acid. Data have been normalized on the basis of the Np concentration of the initial
Image
EXAFS (left) and FT (right) spectra for ( a ) haiweeite and ( b ) <b>soddyite</b>....
Published: 01 July 2004
F igure 6. EXAFS (left) and FT (right) spectra for ( a ) haiweeite and ( b ) soddyite. Solid lines represent experimental data; dashed lines represent fits.
Journal Article
Published: 01 April 1992
American Mineralogist (1992) 77 (3-4): 431–437.
...Eric P. Plesko; Barry E. Scheetz; William B. White Abstract Synthesis studies in the system K 2 O-UO 3 -SiO 2 -H 2 O are presented as an isothermal isobaric projection through the system at 300°C and 30 MPa. In addition to the compatibility relationships for weeksite, boltwoodite, and soddyite...
Journal Article
Published: 01 August 1956
American Mineralogist (1956) 41 (7-8): 539–568.
... and is then usually composed of kasolite or an unidentified phase (Mineral B). Soddyite and sklodowskite occur rarely. There are minor variations in the above general sequence. It some specimens the core may be orange-red gummite without residual uraninite or the original uraninite crystal may be wholly converted...
Journal Article
Published: 01 March 2017
European Journal of Mineralogy (2017) 29 (1): 129–141.
.... It occurs on a matrix of uraninite-bearing quartz gangue associated with soddyite and a minor metazeunerite–metatorbernite series mineral. It is a product of oxidation–hydration weathering of uraninite. Gauthierite is monoclinic, P 2 1 / c , with a = 29.844(2) Å, b = 14.5368(8) Å, c = 14.0406(7) Å, β...
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Journal Article
Published: 01 February 2004
American Mineralogist (2004) 89 (2-3): 339–347.
... honors geologist and conservationist Reginald Claude Sprigg (1919–1994), founder of the Arkaroola Tourist Station. Together with beta-uranophane, soddyite, kasolite, Ce-rich francoisite-(Nd), metatorbernite, billietite, Ba-bearing boltwoodite, schoepite, metaschoepite, and weeksite, spriggite results...
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Journal Article
Published: 01 June 1981
American Mineralogist (1981) 66 (5-6): 610–625.
... the mineral soddyite. This structure is composed of uranyl silicate chains that are crossbonded by sharing a common silicon to give a three-dimensional framework structure. A new triclinic uranyl silicate mineral was discovered during this study, although there is not enough sample to describe it adequately...
Journal Article
Published: 01 August 1965
American Mineralogist (1965) 50 (7-8): 909–923.
... the deposit indicate that uranium has migrated less than 100 feet downslope from the ore body. Radioactive minerals include pitchblende, schoepite, ianthinite, epi-ianthinite, bec-querelite, soddyite, boltwoodite, uranophane, zeunerite, metazeunerite, and a hydrated autunite. Other minerals are tetrahedrite...
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The weight percent standard curve for mixtures of studtite and dehydrated s...
Published: 01 January 2011
F igure 1. The weight percent standard curve for mixtures of studtite and dehydrated schoepite or soddyite based on the intensities of major reflections.
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Polyhedral representations of the crystal structures of uranophane and sodd...
Published: 01 November 2007
F igure 1. Polyhedral representations of the crystal structures of uranophane and soddyite. Projection of the uranyl silicate sheet in uranophane along [100] ( a ) and the entire structure along [010] ( b ). Projection of the framework structure of soddyite along [100] ( c ) and [110] ( d
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Gauthierite crystals with typical terminations on a matrix of uraninite-bea...
Published: 01 March 2017
Fig. 1 Gauthierite crystals with typical terminations on a matrix of uraninite-bearing quartz gangue with tiny yellow soddyite; field of view 1 mm. Photograph by T. Olds. (Online version in colour.)
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Dendritic uraninite mostly altered to “gummite,” which is a mixture of seve...
Published: 01 October 2009
F igure 9. Dendritic uraninite mostly altered to “gummite,” which is a mixture of several uranyl minerals, including soddyite, curite, kasolite, uranophane, boltwoodite, and clarkeite ( Frondel 1956 ; Foord et al. 1997 ). This pegmatitic specimen is from the Ruggles Mine, New Hampshire. Photo
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Structures of uranyl silicates. (a) The uranophane anion-topology and repre...
Published: 01 August 2001
) The sheet that occurs in β-uranophane with a U:Si ratio of 1:1. (d) The structure of soddyite with a U:Si ration of 2:1. (e) The structure of a synthetic uranyl silicate with U:Si ratio of 1:4. Legend as in Figure 1 .