Dravite R050059

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Record 2 of 7  

Name: Dravite
RRUFF ID: R050059
Ideal Chemistry: NaMg3Al6(BO3)3Si6O18(OH)4
Locality: Nepal
Source: Rock Currier
Owner: RRUFF
Description: Dark brown single crystal
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Dravite samples (6) ]
CHEMISTRY 
RRUFF ID: R050059.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Na0.79   0.16Ca0.05)Σ=1(Mg2.44Al0.29   0.14Fe2+0.08Ti0.05)Σ=3Al6.00(BO3)3Si6.00O18(OH)4 ; H2O assumed ideal from stoichiometry; B2O3 estimated by difference
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Sample is oriented, mounted onto a pin and polished
Pin ID: L00191
Orientation: Laser parallel to  -a*  (-1 0 0).     Fiducial mark perpendicular to laser is parallel to  -c   [0 0 -1].
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Direction of polarization of laser relative to fiducial mark:
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050059
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 785nm @ 100% of 500mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050059.1
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
Resolution:
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POWDER DIFFRACTION 
RRUFF ID: R050059.1
Sample Description: Powder
Cell Refinement Output: a: 15.9243(3)Å    b: 15.9243(3)Å    c: 7.1916(2)Å
alpha: 90.°    beta: 90.°    gamma: 120.°   Volume: 1579.36(5)    Crystal System: hexagonal
  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.

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

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REFERENCES for Dravite

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]

King R W, Kerrich R (1989) Chromian dravite associated with ultramafic-rock-hosted Archean lode gold deposits, Timmins–Porcupine district, Ontario, The Canadian Mineralogist, 27, 419-426   [view file]

Peng M, Mao H, Chen L, Chao E C T (1989) The polarized Raman spectra of tourmaline, Annual Report of the Director Geophysical Laboratory, 1989, 99-105   [view file]

Hawthorne F C, MacDonald D J, Burns P C (1993) Reassignment of cation site occupancies in tourmaline: AI-Mg disorder in the crystal structure of dravite, American Mineralogist, 78, 265-270   [view file]

Gashrova B, Mihailova B, Konstantinov L (1997) Raman spectra of various types of tourmaline, European Journal of Mineralogy, 9, 935-940

Hawthorne F C, Henry D J (1999) Classification of the minerals of the tourmaline group, European Journal of Mineralogy, 11, 201-215

Pertlik F, Ertl A, Körner W, Brandstätter F, Schuster R (2003) Na-rich dravite in the marbles from Friesach, Carinthia, Austria: Chemistry and crystal structure, Neues Jahrbuch für Mineralogie, Monatshefte, 2003, 277-288

Bosi F, Lucchesi S (2004) Crystal chemistry of the schorl-dravite series, European Journal of Mineralogy, 16, 335-344

Bosi F, Lucchesi S, Reznitskii L (2004) Crystal chemistry of the dravite-chromdravite series, European Journal of Mineralogy, 16, 345-352

Marschall H R, Ertl A, Hughes J M, McCammon C A (2004) Metamorphic Na- and OH-rich disordered dravite with tetrahedral boron, associated with omphacite, from Syros, Greece: chemistry and structure, European Journal of Mineralogy, 16, 817-823

Bosi F (2008) Disordering of Fe2+ over octahedrally coordinated sites of tourmaline, American Mineralogist, 93, 1647-1653   [view file]

Ertl A, Marschall H R, Giester G, Henry D J, Schertl H P, Ntaflos T, Luvizotto G L, Nasdala L, Tillmanns E (2010) Metamorphic ultrahigh-pressure tourmaline: structure, chemistry, and correlations to P-T conditions, American Mineralogist, 95, 1-10

Bačík P, Méres Š, Uher P (2011) Vanadium-bearing tourmaline in metacherts from Chvojnica, Slovak Republic: crystal chemistry and multistage evolution, The Canadian Mineralogist, 49, 195-206

Hughes J M, Rakovan J, Ertl A, Rossman G R, Baksheev I, Bernhardt H-J (2011) Dissymmetrization in tourmaline: the atomic arrangement of sectorally zoned triclinic Ni-bearing dravite, The Canadian Mineralogist, 49, issue 1 29-40