Afwillite R070296

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Name: Afwillite
RRUFF ID: R070296
Ideal Chemistry: Ca3[SiO4][SiO2(OH)2]·2H2O
Locality: Hatrurim Formation, Negev Desert, West of Dead Sea, southern Israel
Source: Michael Scott S100454 [view label]
Owner: Michael Scott
Description: Colorless bladed crystals, associated with yellow ettringite, R070208.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Spurrite-Afwillite (6) ]
Quick search: [ All Afwillite samples (3) ]
CHEMISTRY 
RRUFF ID: R070296.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca3.00(Si1.00O3)2(OH)2ยท2H2O; trace amounts of Al. OH by charge balance; H2O by difference
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070296
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R070296.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 16.25(1)Å    b: 5.620(3)Å    c: 13.209(7)Å
alpha: 90°    beta: 134.84(2)°    gamma: 90°   Volume: 855.5(7)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 Afwillite

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]

Foshag W F (1925) New minerals: new species, American Mineralogist, 10, 447-448   [view file]

Parry J, Wright F E (1925) Afwillite, a new hydrous calcium silicate, from Dutoitspan mine, Kimberley, South Africa, Mineralogical Magazine, 20, 277-285   [view file]

Woodford A O, Crippen R A, Garner K B (1941) Section across Commercial Quarry, Crestmore, California, American Mineralogist, 26, 351-381   [view file]

Megaw H D (1952) The structure of afwillite, Ca3(SiO3OH)2·2H2O, Acta Crystallographica, 5, 477-491

Switzer G, Bailey E H (1953) Afwillite from Crestmore, California, American Mineralogist, 38, 629-633   [view file]

Malik K M A, Jeffery J W (1976) A reinvestigation of the structure of afwillite, Acta Crystallographica, B32, 475-480

Shannon R D, Shannon R C, Medenbach O, Fischer R X (2002) Refractive index and dispersion of fluorides and oxides, Journal of Physical and Chemical Reference Data, 31, 931-970   [view file]

Rastsvetaeva R K, Chukanov N V, Zadov A E (2009) Refined structure of afwillite from the northern Baikal region, Crystallography Reports, 54, 418-422