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Bultfonteinite R050088
Name: Bultfonteinite
RRUFF ID: R050088
Ideal Chemistry: Ca2SiO3(OH)F·H2O
Locality: N'Chwaning II mine, Kuruman, South Africa
Source: Rock Currier
Owner: RRUFF
Description: Sprays of acicular white crystals associated with olmiite, R050144
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Spurrite-Afwillite (6) ]
CHEMISTRY 
RRUFF ID: R050088.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca1.96[Si0.97O3(OH)1.00]F1.00·0.61H2O; OH estimated by charge balance; H2O by difference
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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  orientation angle.
Direction of polarization of laser relative to fiducial mark:
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050088
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R050088.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.92(2)Å    b: 8.14(2)Å    c: 5.64(2)Å
alpha: 94.2(1)°    beta: 91.2(1)°    gamma: 90.04(8)°   Volume: 500.3(6)Å3    Crystal System: triclinic
  File Type Information Close
Calculated diffraction file.

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

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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Bultfonteinite

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]

Bannister F A (1932) Proceedings of societies: Mineralogical Society of Great Britian and Ireland, American Mineralogist, 17, 455-455   [view file]

Parry J, Williams A F, Wright F E (1932) On bultfonteinite, a new fluorine-bearing hydrous calcium silicate from South Africa, Mineralogical Magazine, 23, 145-162   [view file]

Foshag W F (1933) New mineral names, American Mineralogist, 18, 32-32   [view file]

Megaw H D, Kelsey C H (1954) Cell dimensions of bultfonteinite, Acta Crystallographica, 7, 632-632

Mackenzie R C (1955) Mineralogical Society (London), American Mineralogist, 40, 773-780   [view file]

Megaw H D, Kelsey C H (1955) An accurate determination of the cell dimensions of bultfonteinite, Ca4Si2O10H6F2, Mineralogical Magazine, 30, 569-573   [view file]

Murdoch J (1955) Bultfonteinite from Crestmore, California, American Mineralogist, 40, 900-904   [view file]

McIver E J (1963) The structure of bultfonteinite, Ca4Si2O10F2H6, Acta Crystallographica, 16, 551-558

Biagioni C, Bonaccorsi E, Merlino S (2010) Crystal structure of bultfonteinite, Ca4[SiO3(OH)]2F2·2H2O, from N'chwaning II Mine (Kalahari Manganese Field, Republic of South Africa), Atti della Società Toscana di Scienze Naturali, Memorie, Serie A, 115, 9-15