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meta-autunite

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Journal Article

Dehydration processes in the meta-autunite group minerals meta-autunite, metasaléeite, and metatorbernite Available to Purchase

Yohey Suzuki, Tsutomu Sato, Hiroshi Isobe, Toshihiro Kogure, Takashi Murakami
Published: 01 August 2005
American Mineralogist (2005) 90 (8-9): 1308–1314.
DOI: https://doi.org/10.2138/am.2005.1568
...Yohey Suzuki; Tsutomu Sato; Hiroshi Isobe; Toshihiro Kogure; Takashi Murakami Abstract We investigated dehydration processes in uranyl phosphate minerals of the meta-autunite group that consist of uranyl phosphate sheets and interlayer cations, and water molecules. Meta-autunite [Ca(UO 2 PO 4 ) 2...
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View PDF for article title, Dehydration processes in the <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span> group minerals <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span>, metasaléeite, and metatorbernite
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Journal Article

CRYSTAL STRUCTURES AND SYNTHESIS OF THE COPPER-DOMINANT MEMBERS OF THE AUTUNITE AND META-AUTUNITE GROUPS: TORBERNITE, ZEUNERITE, METATORBERNITE AND METAZEUNERITE Available to Purchase

Andrew J. Locock, Peter C. Burns
Published: 01 April 2003
The Canadian Mineralogist (2003) 41 (2): 489–502.
DOI: https://doi.org/10.2113/gscanmin.41.2.489
... métatorbernite métazeunérite phosphate d’uranyle arsenate d’uranyle structure cristalline Torbernite and zeunerite, as well as metatorbernite and metazeunerite, belong to the autunite and meta-autunite groups, respectively, which together consist of approximately forty mineral species of hydrated...
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View PDF for article title, CRYSTAL STRUCTURES AND SYNTHESIS OF THE COPPER-DOMINANT MEMBERS OF THE <span class="search-highlight">AUTUNITE</span> AND <span class="search-highlight">META</span>-<span class="search-highlight">AUTUNITE</span> GROUPS: TORBERNITE, ZEUNERITE, METATORBERNITE AND METAZEUNERITE
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Add to Citation Manager for CRYSTAL STRUCTURES AND SYNTHESIS OF THE COPPER-DOMINANT MEMBERS OF THE <span class="search-highlight">AUTUNITE</span> AND <span class="search-highlight">META</span>-<span class="search-highlight">AUTUNITE</span> GROUPS: TORBERNITE, ZEUNERITE, METATORBERNITE AND METAZEUNERITE
Journal Article

Bacterially enhanced dissolution of meta-autunite Available to Purchase

Christina M. Smeaton, Christopher G. Weisener, Peter C. Burns, Brian J. Fryer, David A. Fowle
Published: 01 November 2008
American Mineralogist (2008) 93 (11-12): 1858–1864.
DOI: https://doi.org/10.2138/am.2008.2836
...Christina M. Smeaton; Christopher G. Weisener; Peter C. Burns; Brian J. Fryer; David A. Fowle Abstract The release of U from the mineral meta-autunite {Ca[(UO 2 )(PO 2 )](H 2 O) 6 } was evaluated using spectroscopy, aqueous geochemistry, and electron microscopy in a minimal media...
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View PDF for article title, Bacterially enhanced dissolution of <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span>
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Journal Article

Effects of pH, temperature, and aqueous organic material on the dissolution kinetics of meta-autunite minerals, (Na, Ca) 2−1 [(UO 2 )(PO 4 )] 2 · 3H 2 O Available to Purchase

Dawn M. Wellman, Jonathan P. Icenhower, Amy P. Gamerdinger, Steven W. Forrester
Published: 01 January 2006
American Mineralogist (2006) 91 (1): 143–158.
DOI: https://doi.org/10.2138/am.2006.1807
... by the rate of dissolution of autunite and meta-autunite group minerals, X ( n )* 3− n [(UO 2 )(PO 4 )] 2 · x H 2 O, where X = Ca or Na. Single-pass flow-through (SPFT) tests were conducted to quantify the dissolution kinetics of natural Ca meta-autunite, Ca[(UO 2 )(PO 4 )] 2 ·3H 2 O, and synthetic Na meta...
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View PDF for article title, Effects of pH, temperature, and aqueous organic material on the dissolution kinetics of <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span> minerals, (Na, Ca) 2−1 [(UO 2 )(PO 4 )] 2 · 3H 2 O
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Journal Article

MONOVALENT CATIONS IN STRUCTURES OF THE META-AUTUNITE GROUP Available to Purchase

Andrew J. Locock, Peter C. Burns, M. John M. Duke, Theodore M. Flynn
Published: 01 August 2004
The Canadian Mineralogist (2004) 42 (4): 973–996.
DOI: https://doi.org/10.2113/gscanmin.42.4.973
...Andrew J. Locock; Peter C. Burns; M. John M. Duke; Theodore M. Flynn Abstract Compounds of the meta-autunite group containing monovalent cations (Li, Na, K, Rb, Cs, Ag, Tl) have been synthesized by diffusion in gels or by hydrothermal methods, and their crystal structures determined. Single-crystal...
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View PDF for article title, MONOVALENT CATIONS IN STRUCTURES OF THE <span class="search-highlight">META</span>-<span class="search-highlight">AUTUNITE</span> GROUP
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Journal Article

Sodian potassian hydroxonian meta-autunite: first natural occurrence of an intermediate member of a predicted solid solution series Available to Purchase

C. R. M. Butt, J. Graham
Published: 01 October 1981
American Mineralogist (1981) 66 (9-10): 1068–1072.
...C. R. M. Butt; J. Graham Abstract Sodian potassian hydroxonian meta-autunite, (Na 0.56 K 0.29 (H 3 O) 0.16 ) · UO 2 · PO 4 · 3.25H 2 O, is a novel member of the meta-autunite group. It occurs in a playa 105 km NNE of Kalgoorlie, Western Australia as void and fracture infillings in near-surface...
View PDF for article title, Sodian potassian hydroxonian <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span>: first natural occurrence of an intermediate member of a predicted solid solution series
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Journal Article

The Crystallography Of Meta-Autunite (I) Available to Purchase

Malcolm Ross
Published: 01 December 1963
American Mineralogist (1963) 48 (11-12): 1389–1393.
...Malcolm Ross Abstract The exact unit-cell size and space-group symmetry of meta-autunite (I), Ca(UO 2 PO 4 ) 2 -nH 2 O, have been in dispute for some time, for example, see Takano (1961), Donnay and Donnay (1955), Makarov and Ivanov (1960) and Volborth (1959). In this paper data are presented...
View PDF for article title, The Crystallography Of <span class="search-highlight">Meta</span>-<span class="search-highlight">Autunite</span> (I)
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Journal Article

Strontian meta-autunite from the Daybreak Mine, Mt. Spokane, Washington Available to Purchase

A. Volborth
Published: 01 August 1959
American Mineralogist (1959) 44 (7-8): 702–711.
...A. Volborth Abstract Chemical analysis, x -ray, and optical data of meta-autunite from Daybreak Mine, near Mt. Spokane, Wash., are compared with previous data on meta-autunite. It is shown that Mt. Spokane meta-autunite represents a very pure material with properties close to the theoretical...
View PDF for article title, Strontian <span class="search-highlight">meta</span>-<span class="search-highlight">autunite</span> from the Daybreak Mine, Mt. Spokane, Washington
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TEM images of autunite laths at 2856 h of (a) meta-autunite control and (b) inoculated autunite.

TEM images of autunite laths at 2856 h of ( a ) meta-autunite control and (... Available to Purchase

Published: 01 November 2008
F igure 8. TEM images of autunite laths at 2856 h of ( a ) meta-autunite control and ( b ) inoculated autunite.
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EXAFS (left) and FT (right) spectra for the autunite and meta-autunite group minerals (a) meta-ankoleite, (b) meta-autunite, (c) metatorbernite, and (d) saléeite. Solid lines represent experimental data; dashed lines represent fits.

EXAFS (left) and FT (right) spectra for the autunite and meta-autunite grou... Available to Purchase

Published: 01 July 2004
F igure 7. EXAFS (left) and FT (right) spectra for the autunite and meta-autunite group minerals ( a ) meta-ankoleite, ( b ) meta-autunite, ( c ) metatorbernite, and ( d ) saléeite. Solid lines represent experimental data; dashed lines represent fits.
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Aqueous U release as a function of time for the meta-autunite dissolution experiments inoculated with S. putrefaciens 200R (black circles) and the sterile controls (gray squares).

Aqueous U release as a function of time for the meta-autunite dissolution e... Available to Purchase

Published: 01 November 2008
F igure 1. Aqueous U release as a function of time for the meta-autunite dissolution experiments inoculated with S. putrefaciens 200R (black circles) and the sterile controls (gray squares).
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Aqueous P release as a function of time for the meta-autunite dissolution experiments inoculated with S. putrefaciens 200R (black circles) and the sterile controls (gray squares).

Aqueous P release as a function of time for the meta-autunite dissolution e... Available to Purchase

Published: 01 November 2008
F igure 3. Aqueous P release as a function of time for the meta-autunite dissolution experiments inoculated with S. putrefaciens 200R (black circles) and the sterile controls (gray squares).
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Shewanella putrefaciens on meta-autunite surface at 3364 h.

Shewanella putrefaciens on meta-autunite surface at 3364 h. Available to Purchase

Published: 01 November 2008
F igure 6. Shewanella putrefaciens on meta-autunite surface at 3364 h.
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Infrared spectra of (a) metatorbernite, (b) meta-autunite, and (c) metasaléeite in the region of 4000 to 2500 cm−1 in which absorption bands are attributed to the O-H stretching vibration of 4000 to 2500 cm−1 have been described to be minor (Suzuki et al. 1998).

Infrared spectra of ( a ) metatorbernite, ( b ) meta-autunite, and ( c ) me... Available to Purchase

Published: 01 August 2005
F igure 2. Infrared spectra of ( a ) metatorbernite, ( b ) meta-autunite, and ( c ) metasaléeite in the region of 4000 to 2500 cm −1 in which absorption bands are attributed to the O-H stretching vibration of 4000 to 2500 cm −1 have been described to be minor ( Suzuki et al. 1998 ).
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TG and DTA curves of (a) meta-autunite, (b) metasaléeite, and (c) metatorbernite measured from room temperature to 500 °C with a constant N2 flow of 100 mL/min. The heating rate was 2.5 °C/min. Arrows show endothermic peaks.

TG and DTA curves of ( a ) meta-autunite, ( b ) metasaléeite, and ( c ) me... Available to Purchase

Published: 01 August 2005
F igure 3. TG and DTA curves of ( a ) meta-autunite, ( b ) metasaléeite, and ( c ) metatorbernite measured from room temperature to 500 °C with a constant N 2 flow of 100 mL/min. The heating rate was 2.5 °C/min. Arrows show endothermic peaks.
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Temperature-controlled XRD patterns of (a) meta-autunite, (b) metasaléeite, and (c) metatorbernite observed in the temperature range from room temperature to 300 °C with a constant N2 flow of 100 mL/min. The temperature was increased to 300 °C at a rate of 2.5 °C/min. The XRD patterns are only shown between 7.5 and 17.5° 2𝛉 because significant peaks were observed only in this range. Experimental errors were less than 0.04 Å.

Temperature-controlled XRD patterns of ( a ) meta-autunite, ( b ) metasalé... Available to Purchase

Published: 01 August 2005
F igure 4. Temperature-controlled XRD patterns of ( a ) meta-autunite, ( b ) metasaléeite, and ( c ) metatorbernite observed in the temperature range from room temperature to 300 °C with a constant N 2 flow of 100 mL/min. The temperature was increased to 300 °C at a rate of 2.5 °C/min
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[11̅0] SAED pattern of meta-autunite. The specimen was prepared to orient the c* axis normal to the electron beam.

[11̅0] SAED pattern of meta-autunite. The specimen was prepared to orient t... Available to Purchase

Published: 01 August 2005
F igure 5. [11̅0] SAED pattern of meta-autunite. The specimen was prepared to orient the c * axis normal to the electron beam.
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CELL PARAMETERS OF META-AUTUNITE GROUP COMPOUNDS THAT CONTAIN MONOVALENT CA... Available to Purchase

Published: 01 August 2004
TABLE 1. CELL PARAMETERS OF META-AUTUNITE GROUP COMPOUNDS THAT CONTAIN MONOVALENT CATIONS
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The structure of monovalent meta-autunite compounds with space group P4/ncc, projected along [100]. Uranyl polyhedra are yellow, and the tetrahedra are green. The monovalent cations and H2O groups are disordered on the interlayer site (shown in red), with maximum occupancy of 25% of the site. The O…O distances, consistent with hydrogen bonds (and cation–oxygen bonds), are shown.

The structure of monovalent meta-autunite compounds with space group P 4/ ... Available to Purchase

Published: 01 August 2004
F ig . 5. The structure of monovalent meta-autunite compounds with space group P 4/ ncc , projected along [100]. Uranyl polyhedra are yellow, and the tetrahedra are green. The monovalent cations and H 2 O groups are disordered on the interlayer site (shown in red), with maximum occupancy of 25
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The interlayer of monovalent meta-autunite compounds with space group P4/ncc, projected along [001]. The O…O distances, consistent with hydrogen bonds (and cation–oxygen bonds), are shown.

The interlayer of monovalent meta-autunite compounds with space group P 4/... Available to Purchase

Published: 01 August 2004
F ig . 6. The interlayer of monovalent meta-autunite compounds with space group P 4/ ncc , projected along [001]. The O…O distances, consistent with hydrogen bonds (and cation–oxygen bonds), are shown.