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Frankamenite Mineral Data

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General Frankamenite Information

Help on Chemical  Formula: Chemical Formula: K3Na3Ca5(Si12O30)[F,(OH)]4•(H2O)
Help on Composition: Composition: Molecular Weight = 1,298.37 gm
   Potassium   8.73 %  K    10.52 % K2O
   Sodium      5.13 %  Na    6.92 % Na2O
   Calcium    15.74 %  Ca   22.03 % CaO
   Manganese   0.42 %  Mn    0.55 % MnO
   Silicon    25.96 %  Si   55.53 % SiO2
   Hydrogen    0.23 %  H     2.08 % H2O
   Oxygen     39.68 %  O
   Fluorine    4.10 %  F     4.10 % F
                -   %   F    -1.73 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.9Na2.9Ca5.1Mn2+0.1Si12O30F2.8(OH)1.4�0.8(H2O)
Help on Environment: Environment: Charoitic rocks of the Murun alkaline massif.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Charo and Tokko Rivers, Murun, Murunsky massif, Yakutia, East Siberia, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after V.A. Frank-Kamenetsky (1915-1994), Russian mineralogist-crystallographer.
Help on Name Pronunciation: Name Pronunciation: Frankamenite + Pronunciation Say FRANKAMENITE
Help on Synonym: Synonym: Canasite - triclinic
  ICSD 82885

Frankamenite Image

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Comments: Grayish lilac, fine-grained frankamentite.
Location: Murun Massif, Irkutsk District, Russia. Scale: Specimen Size 3.5x2.5x2.5 cm.
© Sonke Stolze / Systematic Minerals

Frankamenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7953:1:0.5704
Help on Cell Dimensions: Cell Dimensions: a = 10.094, b = 12.691, c = 7.24, Z = 1; alpha = 90°, beta = 111.02°, gamma = 110.2° V = 812.50 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.915(1)(330), 4.7(0.54)(210), 4.21(0.4)(130), 5.88(0.37)(020), 3.01(0.25)(246), 2.946(0.14)(040), 2.878(0.06)(141),

Physical Properties of Frankamenite

Help on Cleavage: Cleavage: {010} Good, {100} Good
Help on Color: Color: Greenish blue, Bluish gray, Greenish gray, Lilac gray.
Help on Density: Density: 2.68
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale blue

Optical Properties of Frankamenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2011,KPDmeas= 0.2011,KC= 0.2056
Ncalc = 1.55
Help on Optical Data: Optical Data: Biaxial (+), a=1.536, b=1.539, g=1.542, bire=0.0060

Calculated Properties of Frankamenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Frankamenite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEFrankamenite = 4.01 barns/electron
U=PEFrankamenite x relectron= 10.69 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 125.25 (Gamma Ray American Petroleum Institute Units)
Concentration of Frankamenite per GRapi unit = 0.80 (%)

Estimated Radioactivity from Frankamenite - barely detectable


Frankamenite Classification

Help on  Dana Class: Dana Class: (70)Inosilicate Column or Tube Structures
  (70.02)with Si2O7 dimers
  (70.02.01)Dana Group Miserite K1.5-x(Ca,Y,REE)5[Si6O15][Si2O7](OH,F)2•yH2O P1 1 Frankamenite! K3Na3Ca5(Si12O30)[F,(OH)]4•(H2O) P1 1
Help on  Strunz Class: Strunz Class: 09.DG.90 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DG -Inosilicates with 3-periodic single and multiple chains
09.DG.90 Frankamenite! K3Na3Ca5(Si12O30)[F,(OH)]4•(H2O) P1 1

Other Frankamenite Information

Help on References: References: NAME( AmMin, Vol 82, p 430) PHYS. PROP.(AmMin, Vol 82, p 430) OPTIC PROP.(AmMin, Vol 82, p 430)
Help on See Also: See Also: Links to other databases for Frankamenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.DG.90





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