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winchite

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Journal Article
Published: 01 February 2007
Mineralogical Magazine (2007) 71 (1): 93–104.
... formula very close to an intermediate composition between winchite and richterite, i.e. A A 0.5 B NaCa C Mg 4.5 M 0.5 3+ T Si 8 O 22 (OH) 2 ( A = Na and/or K; M 3+ = Fe 3+ and/or Al). The Rietveld analysis showed the powder samples used for the experiments here to be composed only of amphibole...
FIGURES
Journal Article
Published: 01 February 2001
The Canadian Mineralogist (2001) 39 (1): 171–177.
...Elena V. Sokolova; Frank C. Hawthorne; Valeriya Gorbatova; Catherine McCammon; Julius Schneider Abstract Nous avons affiné la structure cristalline d’un échantillon de winchite riche en fer ferrique (□ 0.87 K 0.13 ) ∑1.00 (Ca 0.65 Na 1.34 ) ∑1.99 (Mg 2.78 Fe 2+ 0.12 Mn 0.07 Ti 0.01 ) ∑2.98 (Fe 2...
FIGURES
Journal Article
Published: 01 March 1994
Mineralogical Magazine (1994) 58 (1): 168–172.
Journal Article
Published: 01 June 1981
American Mineralogist (1981) 66 (5-6): 625–631.
...Bernard E. Leake; Colin M. Farrow; V. K. Nayak Abstract An extensive search for winchite [CaNaMg 4 AlSi 8 O 22 (OH) 2 ] by microprobe anlyses of violet amphiboles obtained from the type locality has failed to identify any sodic calcic amphiboles. In particular, none is near to either the original...
Journal Article
Published: 01 February 1980
The Canadian Mineralogist (1980) 18 (1): 101–107.
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Figure 6. Example of the asbestiform ferrian <span class="search-highlight">winchite</span> that occurs in a syen...
Published: 01 January 2007
Figure 6. Example of the asbestiform ferrian winchite that occurs in a syenite dike in the historic Camp Albion mining district, Boulder County, Colorado ( Wahlstrom, 1934 ).
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Room-temperature Mössbauer spectrum of ferrian <span class="search-highlight">winchite</span> showing a fit to t...
Published: 01 February 2001
F ig . 2. Room-temperature Mössbauer spectrum of ferrian winchite showing a fit to two Fe 2+ doublets (unshaded) and one Fe 3+ doublet (shaded).
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SELECTED INTERATOMIC DISTANCES (Å) AND ANGLES (°) FOR FERRIAN <span class="search-highlight">WINCHITE</span>
Published: 01 February 2001
TABLE 3. SELECTED INTERATOMIC DISTANCES (Å) AND ANGLES (°) FOR FERRIAN WINCHITE
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CRYSTALLOGRAPHIC DATA FOR FERRIAN <span class="search-highlight">WINCHITE</span>
Published: 01 February 2001
TABLE 1. CRYSTALLOGRAPHIC DATA FOR FERRIAN WINCHITE
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FINAL ATOM PARAMETERS FOR FERRIAN <span class="search-highlight">WINCHITE</span>
Published: 01 February 2001
TABLE 2. FINAL ATOM PARAMETERS FOR FERRIAN WINCHITE
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CHEMICAL COMPOSITION AND FORMULA UNIT ( apfu ) FOR FERRIAN <span class="search-highlight">WINCHITE</span>
Published: 01 February 2001
TABLE 5. CHEMICAL COMPOSITION AND FORMULA UNIT ( apfu ) FOR FERRIAN WINCHITE
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SEM image of fibrous crystals of ferrian <span class="search-highlight">winchite</span>. The scale bar represents...
Published: 01 February 2001
F ig . 1. SEM image of fibrous crystals of ferrian winchite. The scale bar represents 200 μm.
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The X-ray powder-diffraction pattern for ferrian <span class="search-highlight">winchite</span>: the observed pat...
Published: 01 February 2001
F ig . 3. The X-ray powder-diffraction pattern for ferrian winchite: the observed pattern is shown by the small circles (dots), the calculated pattern is the continuous line, the vertical lines show the positions of all Bragg reflections for ferrian winchite and quartz (below); at the bottom
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Amphibole compositions from the best 169 EPMA analyses, as determined from ...
Published: 01 November 2003
F igure 5. Amphibole compositions from the best 169 EPMA analyses, as determined from cation ratios, based on the criteria of Leake et al. (1997) . End-member points for tremolite, winchite, richterite, magnesioriebeckite, and magnesio-afrvedsonite are shown. The data suggest that complete
Journal Article
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 174–183.
...Adam Pieczka; Marcin Stachowicz; Sylwia Zelek-Pogudz; Bożena Gołębiowska; Mateusz Sęk; Krzysztof Nejbert; Jakub Kotowski; Beata Marciniak-Maliszewska; Adam Szuszkiewicz; Eligiusz Szełęg; Katarzyna M. Stadnicka; Krzysztof Woźniak Abstract Scandian actinolite evolving to scandio-winchite (up to 5.45...
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Mineral assemblages in different lithological units.            Rock types ...
Published: 14 April 2021
Table 1. Mineral assemblages in different lithological units. Rock types Major minerals Accessory minerals Calcite carbonatite Calcite + Sr-Mg calcite + dolomite ± richterite ± ferri-winchite ± phlogopite Apatite ± magnetite Dolomite carbonatite Dolomite + calcite + Ba-Sr
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Schematic pressure-temperature ( P-T ) paths for the Canoe Landing Lake win...
Published: 01 November 2008
Figure 11. Schematic pressure-temperature ( P-T ) paths for the Canoe Landing Lake winchite nappe (C, pink), blueschists sensu stricto (B, purple), and biotite zone of the Tetagouche block (TB, yellow). The P-T path of the Tetagouche block was largely constructed on the basis of microstructural
Journal Article
Published: 01 October 2003
The Canadian Mineralogist (2003) 41 (5): 1241–1253.
... fragments to elongate near-bundles of fibers. Variations in conformity to the properties of a single crystal are reflected in the character of the X-ray reflections on X-ray rotation photographs. Using current nomenclature recommendations, all of the samples examined consist of winchite. Covariance among...
FIGURES | View All (10)
Journal Article
Published: 01 October 2000
American Mineralogist (2000) 85 (10): 1540–1542.
...Ann G. Wylie; Jennifer R. Verkouteren Abstract Richterite-asbestos and winchite-asbestos are not listed in the federal regulations governing asbestos. However, asbestiform winchite is found in the gangue at the Libby, Montana, vermiculite deposit, where asbestos-related diseases have been reported...
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Backscattered electron image of a portion of the products from treating win...
Published: 01 April 2014
Figure 6 Backscattered electron image of a portion of the products from treating winchitic amphibole in the presence of an oxide-hydroxide mixture of glaucophane bulk composition at 750 °C, 1.82 GPa, for 120 h (GLTR 6-6, Table 3 ). This image shows lighter winchite-rich cores (C) with slightly