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Name: Vermiculite RRUFF ID: R050490 Ideal Chemistry: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O Locality: near Tonopah, Nevada, USA Source: California Institute of Technology W-20939 Owner: RRUFF Description: Dark green micaceous fragment Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis |
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Mineral Groups: [ Clay (86) ] [ Smectite-vermiculite (7) ] |
CHEMISTRY | ||||||||
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RAMAN SPECTRUM | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||||
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POWDER DIFFRACTION | |||||||
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RRUFF ID: | R050490.1 | ||||||
Sample Description: | Powder, cell parameters are from single crystal | ||||||
Cell Refinement Output: |
a: 5.35(1)Å b: 9.28(2)Å c: 29.77(9)Å alpha: 90° beta: 92.5(1)° gamma: 90° Volume: 1477(3)Å3 Crystal System: monoclinic |
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REFERENCES for Vermiculite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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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] |
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Webb T H (1824) New localities of tourmalines and talc, American Journal of Science and Arts, 7, 55-55 [view file] |
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Shirozu H, Bailey S W (1966) Crystal structure of a two-layer Mg-vermiculite, American Mineralogist, 51, 1124-1143 [view file] |
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Ruiz Cruz M D, Nieto J M (2006) Chemical and structural evolution of "metamorphic vermiculite" in metaclastic rocks of the Betic Cordillera, Málaga, Spain: a synthesis, The Canadian Mineralogist, 44, 249-265 [view file] |
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Arguelles A, Leoni M, Blanco J A, Marco C (2010) Semi-ordered crystalline structure of the Santa Olalla vermiculite inferred from X-ray powdered diffraction, American Mineralogist, 95, 126-134 [view file] |
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Gailhanou H, Blanc P, Rogez J, Mikaelian G, Horiuchi K, Yamamura Y, Saito K, Kawaji H, Warmont F, Grenèche J M, Vieillard P, Fialips C I, Giffaut E, Gaucher E C (2013) Thermodynamic properties of saponite, nontronite, and vermiculite derived from calorimetric measurements, American Mineralogist, 98, 1834-1847 |
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Martos-Villa R, Guggenheim S, Sainz-Díaz C I (2013) Interlayer water molecules in organocation-exchanged vermiculite and montmorillonite: A case study of tetramethylammonium, American Mineralogist, 98, 1535-1542 |
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