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Epistolite R070396
Name: Epistolite
RRUFF ID: R070396
Ideal Chemistry: (Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4
Locality: Tugtup Agtakorfia, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
Source: Michael Scott S104615 [view label]
Owner: RRUFF
Description: White platy crystals associated with pectolite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Epistolite (9) ]
CHEMISTRY 
RRUFF ID: R070396.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Na3.07Ca0.20K0.13Mg0.10Mn0.09)Σ=3.59(Ti0.71Fe0.12V0.02)Σ=0.85Nb2.03[(Si2O7)1.92(Al2O7)0.8]Σ=2[O1F0.43Cl0.02(OH)2]Σ=3.45[(PO4)0.24(SO4)0.01]•2.58H2O
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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Direction of polarization of laser relative to fiducial mark:
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070396
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: R070396.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 5.444(2)Å    b: 7.168(3)Å    c: 12.053(4)Å
alpha: 103.79(4)°    beta: 95.89(4)°    gamma: 90.02(4)°   Volume: 454.0(9)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 Epistolite

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]

Boeggild O B (1901) Epistolite, a new mineral, Meddelelser om Grønland, 24, 183-190   [view file]

Sokolova E, Hawthorne F C (2004) The crystal chemistry of epistolite, The Canadian Mineralogist, 42, 797-806   [view file]

Jambor J L, Roberts A C (2005) New mineral names, American Mineralogist, 90, 271-275   [view file]

Nèmeth P, Ferraris G, Radnóczi G, Ageeva O A (2005) TEM and X-ray study of syntactic intergrowths of epistolite, murmanite and shkatulkalite, The Canadian Mineralogist, 43, 973-987   [view file]

Locock A J, Piilonen P C, Ercit T S, Rowe R (2006) New mineral names, American Mineralogist, 91, 216-224   [view file]

Sokolova E (2006) From structure topology to chemical composition. I. Structural hierarchy and stereochemistry in titanium disilicate minerals, The Canadian Mineralogist, 44, 1273-1330   [view file]