Tienshanite Mineral Data

Tienshanite Mineral Data
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General Tienshanite Information

Help on Chemical Formula: Chemical Formula: BaNa2MnTiB2Si6O20
Help on Composition: Composition: Molecular Weight = 796.25 gm
   Barium     17.25 %  Ba   19.26 % BaO
   Sodium      5.77 %  Na    7.78 % Na2O
   Titanium    6.01 %  Ti   10.03 % TiO2
   Manganese   6.90 %  Mn    8.91 % MnO
   Silicon    21.16 %  Si   45.28 % SiO2
   Boron       2.72 %  B     8.74 % B2O3
   Oxygen     40.19 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaNa2Mn2+TiB2Si6O20
Help on Environment: Environment: Pegmatite cutting alkalic syenite.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Dara-i-pioz massif, Tien Shan, southern Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tienshanite + Pronunciation Say TIENSHANITE
Help on Synonym: Synonym: ICSD 76913
  PDF 20-1291
 

Tienshanite Image

Click Here for Larger Tienshanite Image in a New Browser Window Images:
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Tienshanite   Kupletskite-(Cs)

Comments: Dark olive-green colored crystalline tienshanite with cesium-kupletskite in microcline.
Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tienshanite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.62216
Help on Cell Dimensions: Cell Dimensions: a = 16.772, c = 10.435, Z = 6; V = 2,542.10 Den(Calc)= 3.12
Help on Crystal System: Crystal System: Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.19(1), 3.177(0.9), 3.474(0.8),
Click Here for Large Tienshanite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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 Help on Above


Cooper M A , Hawthorne F C , The Canadian Mineralogist , 36 (1998) p.1305-1310, Refinement of the crystal structure of tienshanite: short-range-order, constraints on chemical composition

 

Physical Properties of Tienshanite

Help on Cleavage: Cleavage: {0001} Distinct
Help on Color: Color: Pistachio green.
Help on Density: Density: 3.29
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Tienshanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2114,KPDmeas= 0.2005,KC= 0.2094
Ncalc = 1.65 - 1.69
Help on Optical Data: Optical Data: Uniaxial (-), e=1.653, w=1.666, bire=0.0130.
 

Calculated Properties of Tienshanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Tienshanite =3.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PETienshanite = 76.38 barns/electron
U=PETienshanite x rElectron Density= 226.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tienshanite is Not Radioactive
 

Tienshanite Classification
Help on Dana Class: Dana Class: 64.04.01.01 (64)Cyclosilicates
  (64.04)6-membered rings with [Si2O7] dimers
  (64.04.01)Dana Group
 
64.04.01.01 Tienshanite BaNa2MnTiB2Si6O20 P 6/m 6/m
Help on Strunz Class: Strunz Class: 09.CL.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CL -[Si6O18]12- branched 6-membered single rings
 
09.CL.05 Tienshanite BaNa2MnTiB2Si6O20 P 6/m 6/m
 

Other Tienshanite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tienshanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Tienshanite

BaNa2MnTiB2Si6O20
Dana No: 64.04.01.01 Strunz No: 09.CL.05
Locality:

 

Notes: