Tyretskite Mineral Data

Tyretskite Mineral Data +

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General Tyretskite Information

Chemical Formula:

Ca2B5O9(OH)·(H2O)

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

Empirical Formula:

Ca₂B₅O₉(OH)·(H₂O)

IMA Status:

Approved IMA 1964

Locality:

Link to MinDat.org Location Data.

Tyretskite Image

Images:

Tyretskite

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

Tyretskite Crystallography

Axial Ratios:

a:b:c =0.9737:1:1.0139

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

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.86(1), 2.93(1), 2.14(0.9),

Physical Properties of Tyretskite

Color:

Brownish, Brownish white, White.

Density:

2.189

Diaphaniety:

Transparent

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tyretskite

Gladstone-Dale:

CI meas= -0.33 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.112 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.249,KPDmeas= 0.298,KC= 0.224

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

Electron Density:

r_electron=2.61 gm/cc
note: r_Tyretskite=2.62 gm/cc.

Fermion Index

Fermion Index = 0.03495
Boson Index = 0.96505

Photoelectric:

PE_Tyretskite= 3.36 barns/electron
U=PE_Tyretskite x r_electron= 8.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tyretskite is Not Radioactive

Tyretskite Classification

Dana Class:

26.5.15.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.5)Dana Type

(26.5.15)Dana Group

26.5.15.1 Tyretskite Ca2B5O9(OH)·(H2O) P1 1

Strunz Class:

V/K.04-30 V - Nitrates, Carbonates and Borates

V/K - Layered borates with complex groups [Bx(O,OH)y]

V/K.04 - Hilgardite-1Tc - Heidornite series

V/K.04-10 Hilgardite Ca2B5O9Cl·(H2O) P1 1

V/K.04-30 Tyretskite Ca2B5O9(OH)·(H2O) P1 1

V/K.04-40 Heidornite Na2Ca3B5O8(SO4)2Cl(OH)2 C 2/c 2/m

Other Tyretskite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Tyretskite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Translate Tyretskite Mineral Data :

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Print or Cut-and-Paste your Tyretskite Specimen Label here :

Tyretskite

Ca2B5O9(OH)·(H2O)
Dana No: 26.5.15.1 Strunz No: V/K.04-30
Locality:

Notes: