Vermiculite R050490

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
Mineral Groups: [ Clay (87) ] [ Smectite-vermiculite (8) ]
RRUFF ID: R050490.2
Sample Description: Microprobe fragment
Measured Chemistry: (Mg2.26Fe3+0.25Al0.25Ca0.24)Σ=3(Si3.50Al0.50)Σ=4O10((OH)1.90F0.10)Σ=2·4H2O
Sample Description: Unoriented sample

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RRUFF ID: R050490
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050490.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
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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
  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Vermiculite

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]

Webb T H (1824) New localities of tourmalines and talc, American Journal of Science and Arts, 7, 55-55   [view file]

Shirozu H, Bailey S W (1966) Crystal structure of a two-layer Mg-vermiculite, American Mineralogist, 51, 1124-1143   [view file]

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]

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]

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

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