Sepiolite R070311



Name: Sepiolite
RRUFF ID: R070311
Ideal Chemistry: Mg4Si6O15(OH)2·6H2O
Locality: Miller Quartz, near Santa Cruz, Santa Cruz County, California, USA
Source: James Shigley [view label]
Owner: RRUFF
Description: Tan colored compact fibrous
Status: The identification of this mineral has been made only by X-ray diffraction.
Mineral Groups: [ Sepiolite (1) ] [ Clay (87) ]
CHEMISTRY 
RRUFF ID: R070311.2
Sample Description: Microprobe Fragment
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070311
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 785nm @ 100% of 500mW
POWDER DIFFRACTION 
RRUFF ID: R070311.1
Sample Description: Powder
Cell Refinement Output: a: 13.381(2)Å    b: 27.033(7)Å    c: 5.012(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1813.0(9)Å3    Crystal System: orthorhombic
  File Type Information Close
Calculated diffraction file.

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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 Sepiolite

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]

Glocker E F (1847) Ordo XIII. Argillitae. II. Argillitae pingues. 15. Sepiolithus., in Generum et Specierum Mineralium, Secundum Ordines Naturales Digestorum Synopsis Apud Eduardum Anton 185-195   [view file]

Brauner K, Preisinger A (1956) Struktur und entstehung des sepioliths, Tschermaks Mineralogische und Petrographische Mitteilungen, 6, 120-140

Preisinger A (1959) X-ray study of the structure of sepiolite, Clays and Clay Minerals, 6, 61-67

Laufer E E, Mossman D J (1982) The identification of sepiolite in the Prairie Evaporite Formation of Saskatchewan, The Canadian Mineralogist, 20, 151-154   [view file]

Kadir S, Bas H, Karakas Z (2002) Origin of sepiolite and loughlinite in a neogene volcano-sedimentary lacustrine environment, Mihaliccik-Eskisehir, Turkey, The Canadian Mineralogist, 40, 1091-1102   [view file]

Post J E, Bish D L, Heaney P J (2007) Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of sepiolite, American Mineralogist, 92, 91-97   [view file]

Giustetto R, Levy D, Wahyudi O, Ricchiardi G, Vitillo J G (2011) Crystal structure refinement of a sepiolite/indigo Maya Blue pigment using molecular modelling and synchrotron diffraction, European Journal of Mineralogy, 23, 449-466

Sánchez M, García-Romero E, Suárez M, Silva I, Fuentes-Montero L, Martínez-Criado G (2011) Variability in sepiolite: Diffraction studies, American Mineralogist, 96, 1443-1454   [view file]