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Tyretskite Mineral Data

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General Tyretskite Information

Help on Chemical  Formula: Chemical Formula: Ca2B5O9(OH)•(H2O)
Help on Composition: Composition: Molecular Weight = 313.22 gm
   Calcium   25.59 %  Ca   35.81 % CaO
   Boron     17.26 %  B    55.57 % B2O3
   Hydrogen   0.97 %  H     8.63 % H2O
   Oxygen    56.19 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2B5O9(OH)•(H2O)
Help on Environment: Environment: Cavity in dolomitic saline rock, in drillcore from a depth of 1233 m.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Tyret railway station, on the east Siberian railway, in the Lena-Angara salt basin, Irkutsk district, Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tyretskite + Pronunciation Say TYRETSKITE

Tyretskite Image

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Comments: Gray granular tyretskite coating.
Location: Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tyretskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9737:1:1.0139
Help on Cell Dimensions: Cell Dimensions: a = 6.3, b = 6.47, c = 6.56, Z = 1; alpha = 74.27°, beta = 61.6°, gamma = 61.25° V = 198.49 Den(Calc)= 2.62
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): 2.86(1), 2.93(1), 2.14(0.9),

Physical Properties of Tyretskite

Help on Color: Color: Brownish, Brownish white, White.
Help on Density: Density: 2.189
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Tyretskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.33 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.151 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2578,KPDmeas= 0.298,KC= 0.224
Ncalc = 1.49 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.637, b=1.65, g=1.67, bire=0.0330, 2V(Calc)=80, 2V(Meas)=46.

Calculated Properties of Tyretskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Tyretskite =2.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETyretskite = 3.36 barns/electron
U=PETyretskite x rElectron Density= 8.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tyretskite is Not Radioactive

Tyretskite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.15)Dana Group Tyretskite Ca2B5O9(OH)•(H2O) P1 1
Help on  Strunz Class: Strunz Class: 06.ED.05 06 - BORATES
  06.E - Pentaborates
  06.ED -Tecto-pentaborates
06.ED.05 Hilgardite Ca2B5O9Cl•(H2O) P1 1
06.ED.05 Tyretskite Ca2B5O9(OH)•(H2O) P1 1
06.ED.05 Kurgantaite! CaSr[B5O9]Cl•(H2O) P1 1
06.ED.05 IMA2007-047! Pb2[B5O9]Cl•0.5H2O Pnn2 mm2

Other Tyretskite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tyretskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 06.ED.05





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