Weeksite R050330



Name: Weeksite
RRUFF ID: R050330
Ideal Chemistry: (K)2(UO2)2(Si5O13)·4H2O
Locality: Anderson mine, Yavapai County, Arizona, USA
Source: Lloyd Twaites
Owner: RRUFF
Description: Yellowish green flattened plates, associated with reddish-orange carnotite, R070647. Sample was used in the Fejfarova et al (2012) study.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
CHEMISTRY 
RRUFF ID: R050330.2
Sample Description: Microprobe fragment
Measured Chemistry: (K1.84Ba0.06Ca0.02)Σ=1.92(U1.00O2)2(Si5.00O13)·1.2H2O
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050330
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 10% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R050330.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 14.1952(3)Å    b: 14.2140(4)Å    c: 9.6278(2)Å
alpha: 90°    beta: 111.5682(8)°    gamma: 90°   Volume: 1806.6(1)Å3    Crystal System: monoclinic
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Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Weeksite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Outerbridge W F, Staatz M H, Meyrowitz R, Pommer A M (1960) Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah, American Mineralogist, 45, 39-52   [view file]

Fleischer M (1961) New mineral names, American Mineralogist, 46, 464-468   [view file]

International Mineralogical Association (1962) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 33, 260-263   [view file]

Chernikov A A, Sidorenko G A, Valueva A A (1977) New data on uranyl minerals of the ursilite-weeksite group (in Russian), Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 106, issue 5 553-564   [view file]

Yeremenko G K, Il'menov Ye S, Azimi N A (1977) Find of weeksite-group minerals in Afghanistan, Doklady Akademii Nauk SSSR Earth Science Sections, 237, 226-228   [view file]

Chernikov A A, Sidorenko G A, Valuyeva A A (1978) New data on uranyl minerals in the ursilite-weeksite group, International Geology Review, 20, 1347-1356

Anderson C A F, Smith D K (1980) The crystal structure of synthetic weeksite, Abstracts Northeastern Section, Geological Society of America, 12, 21-21

Stohl F V, Smith D K (1981) The crystal chemistry of the uranyl silicate minerals, American Mineralogist, 66, 610-625   [view file]

Baturin, S V (1985) Crystal-structure of weeksite, Doklady Akademii Nauk SSSR, 282, 1132-1136   [view file]

Jackson J M, Burns P C (2001) A re-evaluation of the structure of weeksite, a uranyl silicate framework mineral, The Canadian Mineralogist, 39, 187-195   [view file]

Jambor J L, Roberts A C (2001) New mineral names, American Mineralogist, 86, 1112-1115   [view file]

Frost R L, Cejka J, Weier M L, Martens W (2006) A Raman and infrared spectroscopic study of the uranyl silicates - weeksite, soddyite and haiweeite: Part 2, Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 63, 305-312

Frost R L, Cejka J, Weier M L, Martens W, Kloprogge J T (2006) A Raman and infrared spectroscopic study of the uranyl silicates - weeksite, soddyite and haiweeite, Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 64, 308-315

Fejfarová K, Plášil J, Yang H, Cejka J, Dušek M, Downs R T, Barkley M C, Škoda R (2012) Revision of the crystal structure and chemical formula of weeksite, K2(UO2)2(Si5O13)·4H2O, American Mineralogist, 97, 750-754   [view file]