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![Illustration of the twinning in <span class="search-highlight">weeksite</span> (red and blue net) in reciprocal s...]()
![Thermal decomposition of <span class="search-highlight">weeksite</span> reflected in weight-loss loss (TG) and it...]()
![Polyhedral representation of <span class="search-highlight">weeksite</span> structure viewed along [001] with lab...]()
![MISCELLANEOUS INFORMATION CONCERNING <span class="search-highlight">WEEKSITE</span>]()
![FINAL ATOMIC PARAMETERS FOR <span class="search-highlight">WEEKSITE</span>]()
![ANISOTROPIC DISPLACEMENT PARAMETERS FOR <span class="search-highlight">WEEKSITE</span>]()
![SELECTED INTERATOMIC DISTANCES (Å) AND ANGLES (°) FOR <span class="search-highlight">WEEKSITE</span>]()
![Polyhedral representation of the structure of <span class="search-highlight">weeksite</span> projected along [100...]()
![Polyhedral representation of the uranyl silicate layer in <span class="search-highlight">weeksite</span> (a). Cha...]()
![COMPOSITION OF <span class="search-highlight">WEEKSITE</span>, AS DETERMINED BY ELECTION-MICROPROBE ANALYSIS]()
![PROPOSED CATION ASSIGNMENTS FOR THE M SITES IN <span class="search-highlight">WEEKSITE</span>]()
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![Polyhedral representation of the uranyl silicate layer that occurs in weeks...]()
![Polyhedral representation of the six-membered rings of silicate tetrahedra ...]()
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1-20 OF 60 RESULTS FOR
weeksite
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1
Journal Article
Revision of the crystal structure and chemical formula of weeksite, K 2 (UO 2 ) 2 (Si 5 O 13 )·4H 2 O
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 750–754.
...Karla Fejfarová; Jakub Plášil; Hexiong Yang; Jiří Čejka; Michal Dušek; Robert T. Downs; Madison C. Barkley; Radek Škoda Abstract The previously published structure determination of weeksite from the Anderson mine, Arizona, U.S.A., suggested that it is orthorhombic, Cmmb , with a = 14.209(2), b...
FIGURES
Includes: Supplemental Content
Journal Article
A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2001
The Canadian Mineralogist (2001) 39 (1): 187–195.
...Jennifer M. Jackson; Peter C. Burns Abstract The structure of weeksite, K 1.26 Ba 0.25 Ca 0.12 [(UO 2 ) 2 (Si 5 O 13 )]H 2 O, orthorhombic, a 14.209(2), b 14.248(2), c 35.869(4) Å, V 7262(2) Å 3 , space group Cmmb , has been solved by direct methods using data collected with Mo K α X-radiation...
FIGURES
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Journal Article
Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 1960
American Mineralogist (1960) 45 (1-2): 39–52.
... fibrous clusters. In the Thomas Kange, where it was first found, it occurs in opal veinlets in rhyolitc and as replacements of pebbles in a tuffaceous conglomerate. Weeksite also has been identified from eight other localities in Pennsylvania, Wyoming, California, New Mexico, Mexico, Arizona, and Texas...
Journal Article
Infrared vibrational characterization and synthesis of a family of hydrous alkali uranyl silicates and hydrous uranyl silicate minerals
Journal: American Mineralogist
Publisher: Mineralogical Society of America
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...
Image
Illustration of the twinning in weeksite (red and blue net) in reciprocal s...
in Revision of the crystal structure and chemical formula of weeksite, K 2 (UO 2 ) 2 (Si 5 O 13 )·4H 2 O
> American Mineralogist
Published: 01 April 2012
Figure 1 Illustration of the twinning in weeksite (red and blue net) in reciprocal space viewed along b*. Reciprocal unit-cell choice by Jackson and Burns (2001) is sketched in green. Reconstruction is based on the experimental data set. (Color online.)
Image
Thermal decomposition of weeksite reflected in weight-loss loss (TG) and it...
in Revision of the crystal structure and chemical formula of weeksite, K 2 (UO 2 ) 2 (Si 5 O 13 )·4H 2 O
> American Mineralogist
Published: 01 April 2012
Figure 2 Thermal decomposition of weeksite reflected in weight-loss loss (TG) and it is difference curve (DTG).
Image
![Polyhedral representation of <span class="search-highlight">weeksite</span> structure viewed along [001] with lab...](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/ammin/97/4/10.2138_am.2012.4025/3/s_0750f3.jpeg?Expires=2147483647&Signature=rZNlpElEuC~HuTns1r6QZpfnkgWuZLh1EifmboyKZ7ybasqsgE2AK22Rsa~JV6MsUfvFJKSEq2UmgmhgCl-WYWncUo~aVEooTGmd3kdkO~szFDU5U6SbPCoydscQwqdht~mBl-AeMZkTkwGc1NyWtxH-1kv80Jx3XSMjJJqoMppbieg3nmdIaKH0aLa5ditsITMXeIVgUZQO~kzTvMc6ZgicBnCC6K9wAHCCEkfmGVmmmAP1oUwrnZ8c315FOE3afjxPUdM5IrfUn5aGLmz7ATOIRKWJvRptPAzG6JRjGV5hlPixEZkdpB~z5jdu01xroxNeHJXvfyqrsQxAsNhUAA__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Polyhedral representation of weeksite structure viewed along [001] with lab...
in Revision of the crystal structure and chemical formula of weeksite, K 2 (UO 2 ) 2 (Si 5 O 13 )·4H 2 O
> American Mineralogist
Published: 01 April 2012
Figure 3 Polyhedral representation of weeksite structure viewed along [001] with labeled M-sites in the interlayer. Uranyl pentagonal bipyramids are yellow, silicate tetrahedra are red; atoms related to M-sites are green and oxygen atoms are red. The unit-cell edges are outlined. (Color online.)
Image
MISCELLANEOUS INFORMATION CONCERNING WEEKSITE
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 1. MISCELLANEOUS INFORMATION CONCERNING WEEKSITE
Image
FINAL ATOMIC PARAMETERS FOR WEEKSITE
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 2. FINAL ATOMIC PARAMETERS FOR WEEKSITE
Image
ANISOTROPIC DISPLACEMENT PARAMETERS FOR WEEKSITE
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 3. ANISOTROPIC DISPLACEMENT PARAMETERS FOR WEEKSITE
Image
SELECTED INTERATOMIC DISTANCES (Å) AND ANGLES (°) FOR WEEKSITE
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 4. SELECTED INTERATOMIC DISTANCES (Å) AND ANGLES (°) FOR WEEKSITE
Image
Polyhedral representation of the structure of weeksite projected along [100...
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
F ig . 1. Polyhedral representation of the structure of weeksite projected along [100]. The silicate tetrahedra are shown in red, the uranyl polyhedra are shown in yellow, purple spheres represent M sites ( M : K, Ca and Ba), and bluish gray spheres represent the two symmetrically distinct H 2
Image
Polyhedral representation of the uranyl silicate layer in weeksite (a). Cha...
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
F ig . 3. Polyhedral representation of the uranyl silicate layer in weeksite (a). Chains of silicate tetrahedra that show split sites are indicated by arrows along [100] in (a). The chain shown in (b) contains split Si sites that arise from the occurrence of the orientations shown in (c) and (d
Image
COMPOSITION OF WEEKSITE, AS DETERMINED BY ELECTION-MICROPROBE ANALYSIS
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 5. COMPOSITION OF WEEKSITE, AS DETERMINED BY ELECTION-MICROPROBE ANALYSIS
Image
PROPOSED CATION ASSIGNMENTS FOR THE M SITES IN WEEKSITE
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
TABLE 6. PROPOSED CATION ASSIGNMENTS FOR THE M SITES IN WEEKSITE
Journal Article
Coutinhoite, a new thorium uranyl silicate hydrate, from Urucum mine, Galiléia, Minas Gerais, Brazil
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2004
American Mineralogist (2004) 89 (5-6): 721–724.
..., Galiléia Co., Minas Gerais, Brazil. Coutinhoite is intimately associated with weeksite, phosphuranylite, meta-uranocircite, and uranocircite on muscovite and microcline. The mineral forms irregular aggregates with very small curved scales, flaky crystals, up to 10 μm long and with a thickness up to about...
FIGURES
Image
Polyhedral representation of the uranyl silicate layer that occurs in weeks...
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
F ig . 2. Polyhedral representation of the uranyl silicate layer that occurs in weeksite, projected along [010]. Legend as in Figure 1 .
Image
Polyhedral representation of the six-membered rings of silicate tetrahedra ...
in A RE-EVALUATION OF THE STRUCTURE OF WEEKSITE, A URANYL SILICATE FRAMEWORK MINERAL
> The Canadian Mineralogist
Published: 01 February 2001
F ig . 4. Polyhedral representation of the six-membered rings of silicate tetrahedra that occur in weeksite, with the location of H 2 O(28) (gray spheres) in the plane of the rings. Legend as in Figure 1 .
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
Journal: American Mineralogist
Publisher: Mineralogical Society of America
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...
FIGURES
| View All (6)
Journal Article
Volcanogenic uranium mineralizations in the Sierra Pena Blanca District, Chihuahua, Mexico; three genetic models
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 April 1991
Economic Geology (1991) 86 (2): 233–248.
... association are observed) and the associated kaolinization of the rock are related to the circulation of hydrothermal fluids in breccias and fault systems. The present-day mineralization consists of mainly U (super +6) minerals (uranophane, weeksite, etc.) produced during later stages under oxidized...
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