Mineralogy Database

Telyushenkoite Mineral Data

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General Telyushenkoite Information

Help on Chemical  Formula: Chemical Formula: CsNa6[Be2(Si,Al)18O39F2]
Help on Composition: Composition: Molecular Weight = 1,433.11 gm
   Cesium      6.40 %  Cs    6.78 % Cs2O
   Potassium   0.38 %  K     0.46 % K2O
   Rubidium    0.06 %  Rb    0.07 % Rb2O
   Sodium     10.11 %  Na   13.62 % Na2O
   Beryllium   1.28 %  Be    3.56 % BeO
   Aluminum    3.88 %  Al    7.33 % Al2O3
   Zinc        1.37 %  Zn    1.70 % ZnO
   Silicon    30.30 %  Si   64.82 % SiO2
   Oxygen     43.36 %  O
   Fluorine    2.86 %  F     2.86 % F
                -   %   F    -1.21 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cs0.69Na0.3K0.14Rb0.01Na6Be2.04Si15.46Al2.06Zn0.3O38.84F2.16
Help on Environment: Environment: In reedmergnerite boulders on the moraine of the Dara-i-Pioz glacier. (related to leifite; structure)
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Moraine of the Darai-Pioz glacier in northern Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Tamara Matveyevna Telyushenko (1930�1997), a petrographer who made major contributions to knowledge of the geology of Central Asia and who headed the Young Geologists� Sch ool of Ashkhabad for over thirty years
Help on Synonym: Synonym: IMA2001-012

Telyushenkoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.33933
Help on Cell Dimensions: Cell Dimensions: a = 14.377, c = 4.8786, Z = 1; V = 873.30 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.162(1)(031), 3.382(0.75)(121), 4.149(0.5)(030),3.456(0.4)(130), 3.113(0.36)(040), 6.226(0.35)(020), 2.465(0.3)(231),

Physical Properties of Telyushenkoite

Help on Cleavage: Cleavage: {100} Distinct
Help on Color: Color: White, Colorless.
Help on Density: Density: 2.73
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Equant Grains - Granular material with equel dimensions in x, y, and z.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Telyushenkoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2009,KPDmeas= 0.2002,KC= 0.1975
Ncalc = 1.54
Help on Optical Data: Optical Data: Uniaxial (+), w=1.562, e=1.531, bire=0.0310.

Calculated Properties of Telyushenkoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Telyushenkoite =2.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PETelyushenkoite = 27.19 barns/electron
U=PETelyushenkoite x relectron= 72.59 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 30.13 (Gamma Ray American Petroleum Institute Units)
Concentration of Telyushenkoite per GRapi unit = 3.32 (%)

Estimated Radioactivity from Telyushenkoite - barely detectable


Telyushenkoite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.10)Dana Group Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: 09.EH.25 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EH -Transitional structures between phyllosilicate and other silicate units
09.EH.25 Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m
09.EH.25 Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m
09.EH.25 Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m

Other Telyushenkoite Information

Help on References: References: NAME( CanMin, v 40, p 183) PHYS. PROP.(CanMin, v 40, p 183) OPTIC PROP.(CanMin, v 40, p 183)
Help on See Also: See Also: Links to other databases for Telyushenkoite :
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.EH.25





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