1-20 OF 71 RESULTS FOR

metaschoepite

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

Neptunium incorporation in sodium-substituted metaschoepite

Amanda L. Klingensmith, Kathryn M. Deely, William S. Kinman, Virginia Kelly, Peter C. Burns
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 662–669.
DOI: https://doi.org/10.2138/am.2007.2350
... oxide hydrate minerals, metaschoepite [(UO 2 ) 4 O(OH) 6 ](H 2 O) 5 , contains sheets of uranyl polyhedra with H 2 O groups located in the interlayer. Several crystals along the series from metaschoepite to Na-substituted metaschoepite (Na-MS), approximate formula Na[(UO 2 ) 4 O 2 (OH) 5 ](H 2 O) 5...
FIGURES | View All (5)
PDF
Purchase
Add to Citation Manager
Includes: Supplemental Content
Journal Article

Structural relations among schoepite, metaschoepite and "dehydrated schoepite"

Robert J. Finch, Frank C. Hawthorne, Rodney C. Ewing
Published: 01 June 1998
The Canadian Mineralogist (1998) 36 (3): 831–845.
PDF
Purchase
Add to Citation Manager
Image
Geometry of the uranyl layers in schoepite, <span class="search-highlight">metaschoepite</span>, and α-UO 2 (OH) ...

Geometry of the uranyl layers in schoepite, metaschoepite, and α-UO 2 (OH) ...

Published: 01 February 2011
F igure 1. Geometry of the uranyl layers in schoepite, metaschoepite, and α-UO 2 (OH) 2 . Spheres represent uranium atoms, rods are U-O bonds. The darker spheres represent U1,U2,U5,U6 and U2,U3 in schoepite ( Finch et al. 1996 ) and metaschoepite ( Weller et al. 2000 ), respectively, while
Image
Scanning electron microscope (SEM) images of <span class="search-highlight">metaschoepite</span> crystals from th...

Scanning electron microscope (SEM) images of metaschoepite crystals from th...

Published: 01 February 2011
F igure 3. Scanning electron microscope (SEM) images of metaschoepite crystals from the Number 2 Workings, Radium Ridge, South Australia, replaced by paulscherrerite. ( a ) Overview of the replaced orthorhombic metaschoepite crystal. ( b ) Close-up showing the porous nature of the replaced
Journal Article

Paulscherrerite from the Number 2 Workings, Mount Painter Inlier, Northern Flinders Ranges, South Australia: “Dehydrated schoepite” is a mineral after all

Joël Brugger, Nicolas Meisser, Barbara Etschmann, Stefan Ansermet, Allan Pring
Published: 01 February 2011
American Mineralogist (2011) 96 (2-3): 229–240.
DOI: https://doi.org/10.2138/am.2011.3601
...F igure 1. Geometry of the uranyl layers in schoepite, metaschoepite, and α-UO 2 (OH) 2 . Spheres represent uranium atoms, rods are U-O bonds. The darker spheres represent U1,U2,U5,U6 and U2,U3 in schoepite ( Finch et al. 1996 ) and metaschoepite ( Weller et al. 2000 ), respectively, while...
FIGURES | View All (9)
PDF
Purchase
Add to Citation Manager
Journal Article

Bobfinchite, Na[(UO 2 ) 8 O 3 (OH) 11 ]·10H 2 O, a new Na-bearing member of the schoepite family

Travis A. Olds, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Joe Marty, John S. McCloy
Published: 01 July 2024
American Mineralogist (2024) 109 (7): 1266–1274.
DOI: https://doi.org/10.2138/am-2023-9031
... product of uraninite on asphaltite matrix in intimate association with gypsum, natrozippeite, metaschoepite, and uranopilite. Bobfinchite crystals are transparent to translucent, yellow, lozenge-shaped disks up to 0.3 mm wide. Crystals are flattened on [100] and exhibit the forms {100}, {011}, {021}, {0 2...
FIGURES | View All (8)
PDF
Purchase
Add to Citation Manager
Includes: Supplemental Content
Image
Reactions among schoepite, <span class="search-highlight">metaschoepite</span>, “dehydrated schoepite” (including...

Reactions among schoepite, metaschoepite, “dehydrated schoepite” (including...

Published: 01 February 2011
F igure 8. Reactions among schoepite, metaschoepite, “dehydrated schoepite” (including paulscherrerite), and α-UO 2 (OH) 2 based on natural occurrences and experimental studies (see text). Modified from Finch et al. (1998) . Paulscherrerite at the type locality (Radium Ridge) forms via
Image
Summary of results for alteration of <span class="search-highlight">metaschoepite</span> to studtite. Note that 0...

Summary of results for alteration of metaschoepite to studtite. Note that 0...

Published: 01 January 2011
F igure 4. Summary of results for alteration of metaschoepite to studtite. Note that 0.1644 M H 2 O 2 is needed to convert all of the dehydrated schoepite to studtite, assuming complete reaction.
Image
Polyhedral representations of the structures of <span class="search-highlight">metaschoepite</span> ( A ), becque...

Polyhedral representations of the structures of metaschoepite ( A ), becque...

Published: 01 December 2006
FIGURE 1 Polyhedral representations of the structures of metaschoepite ( A ), becquerelite ( B ), uranophane ( C ), and compreignacite ( D ). Uranyl polyhedra are yellow, Ca polyhedra are blue, silicate tetrahedra are purple, K atoms are shown as blue spheres, and O atoms of selected H 2 O
Image
Infrared spectra of paulscherrerite and related phases. Notes . The absorb...

Infrared spectra of paulscherrerite and related phases. Notes . The absorb...

Published: 01 February 2011
F igure 7. Infrared spectra of paulscherrerite and related phases. Notes . The absorbance peak at 1384 cm −1 in synthetic metaschoepite was not reported by Urbanec and Čejka (1979) , and may correspond to contamination by an unknown carbonate. KBr pressed disk; paulscherrerite 1.5 mg; UO 2
Image
The sheet of uranyl pentagonal bipyramids that occurs in the structures of ...

The sheet of uranyl pentagonal bipyramids that occurs in the structures of ...

Published: 01 April 2007
F igure 3. The sheet of uranyl pentagonal bipyramids that occurs in the structures of Na-MS as well as metaschoepite, fourmarierite and schoepite.
Journal Article

Uranium Mineralogy and Neptunium Mobility

Peter C. Burns, Amanda L. Klingensmith
Journal: Elements
Published: 01 December 2006
Elements (2006) 2 (6): 351–356.
DOI: https://doi.org/10.2113/gselements.2.6.351
...FIGURE 1 Polyhedral representations of the structures of metaschoepite ( A ), becquerelite ( B ), uranophane ( C ), and compreignacite ( D ). Uranyl polyhedra are yellow, Ca polyhedra are blue, silicate tetrahedra are purple, K atoms are shown as blue spheres, and O atoms of selected H 2 O...
FIGURES | View All (5)
PDF
Purchase
Add to Citation Manager
Journal Article

Leesite, K(H 2 O) 2 [(UO 2 ) 4 O 2 (OH) 5 ]·3H 2 O, a new K-bearing schoepite-family mineral from the Jomac mine, San Juan County, Utah, U.S.A.

Travis A. Olds, Jakub Plášil, Anthony R. Kampf, Tyler Spano, Patrick Haynes, Shawn M. Carlson, Peter C. Burns, Antonio Simonetti, Owen P. Mills
Published: 01 January 2018
American Mineralogist (2018) 103 (1): 143–150.
DOI: https://doi.org/10.2138/am-2018-6083
... of several of these minerals are built from the same sheet topology found in schoepite ( Finch et al. 1996b ), and the so-named schoepite family includes schoepite, metaschoepite, [(UO 2 ) 4 O(OH) 6 ]·5H 2 O ( Weller et al. 2000 ), fourmarierite, Pb[(UO 2 ) 4 O 3 (OH) 4 ]·4H 2 O ( Li and Burns 2000...
FIGURES | View All (5)
PDF
Purchase
Add to Citation Manager
Journal Article

Thermodynamics of uranyl minerals: Enthalpies of formation of uranyl oxide hydrates

Karrie-Ann Kubatko, Katheryn Helean, Alexandra Navrotsky, Peter C. Burns
Published: 01 April 2006
American Mineralogist (2006) 91 (4): 658–666.
DOI: https://doi.org/10.2138/am.2006.1856
...Karrie-Ann Kubatko; Katheryn Helean; Alexandra Navrotsky; Peter C. Burns Abstract The enthalpies of formation of seven uranyl oxide hydrate phases and one uranate have been determined using high-temperature oxide melt solution calorimetry: [(UO 2 ) 4 O(OH) 6 ](H 2 O) 5 , metaschoepite; β-UO 2 (OH...
FIGURES
PDF
Purchase
Add to Citation Manager
Image
The sheet anion-topology that corresponds to the sheets in Na-MS-CRY, metas...

The sheet anion-topology that corresponds to the sheets in Na-MS-CRY, metas...

Published: 01 April 2007
F igure 4. The sheet anion-topology that corresponds to the sheets in Na-MS-CRY, metaschoepite, and fourmarierite with the locations of OH groups indicated by circles. Vertices in the anion topology that do not contain OH correspond to O atoms.
Image
Laser-ablation ICP-MS data for 237 Np from a crystal of Na-substituted met...

Laser-ablation ICP-MS data for 237 Np from a crystal of Na-substituted met...

Published: 01 December 2006
FIGURE 4 Laser-ablation ICP-MS data for 237 Np from a crystal of Na-substituted metaschoepite synthesized from a solution containing approximately 500 ppm Np 5+ . The crystal analyzed is shown as an inset, where the ablation track is apparent.
Journal Article

Spriggite, Pb 3 [(UO 2 ) 6 O 8 (OH) 2 ] (H 2 O) 3 , a new mineral with β-U 3 O 8 –type sheets: Description and crystal structure

Joël Brugger, Sergey V. Krivovichev, Peter Berlepsch, Nicolas Meisser, Stefan Ansermet, Thomas Armbruster
Published: 01 February 2004
American Mineralogist (2004) 89 (2-3): 339–347.
DOI: https://doi.org/10.2138/am-2004-2-312
... 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...
FIGURES | View All (6)
PDF
Purchase
Add to Citation Manager
Image
Laser-ablation ICP-MS data for Np-237 from a crystal of Na-substituted meta...

Laser-ablation ICP-MS data for Np-237 from a crystal of Na-substituted meta...

Published: 01 April 2007
F igure 2. Laser-ablation ICP-MS data for Np-237 from a crystal of Na-substituted metaschoepite synthesized from a solution containing approximately 500 ppm Np 5+ . The crystal analyzed is shown as an inset, where the ablation track is apparent. From Burns and Klingensmith (2006) .
Journal Article

Alteration of dehydrated schoepite and soddyite to studtite, [(UO 2 )(O 2 )(H 2 O) 2 ](H 2 O) 2

Tori Z. Forbes, Patrick Horan, Tara Devine, Daniel McInnis, Peter C. Burns
Published: 01 January 2011
American Mineralogist (2011) 96 (1): 202–206.
DOI: https://doi.org/10.2138/am.2011.3517
...F igure 4. Summary of results for alteration of metaschoepite to studtite. Note that 0.1644 M H 2 O 2 is needed to convert all of the dehydrated schoepite to studtite, assuming complete reaction. ...
FIGURES | View All (4)
PDF
Purchase
Add to Citation Manager
Image
A comparative view of the anion sheet topologies, (OH) – distributions, an...

A comparative view of the anion sheet topologies, (OH) – distributions, an...

Published: 01 January 2018
to that of the synthetic Na-analog of metaschoepite. Potassium (blue), lead (orange), and sodium (yellow). (Color online.)