Odintsovite Mineral Data

General Odintsovite Information

Chemical Formula:

K2Na4Ca3Ti2Be4Si12O38

Composition:

Molecular Weight = 1,367.20 gm

Potassium 5.72 % K 6.89 % K₂O

Sodium 6.73 % Na 9.07 % Na₂O

Calcium 8.79 % Ca 12.30 % CaO

Titanium 7.00 % Ti 11.69 % TiO₂

Beryllium 2.64 % Be 7.32 % BeO

Silicon 24.65 % Si 52.74 % SiO₂

Oxygen 44.47 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Na₄Ca₃Ti₂Be₄Si₁₂O₃₈

Environment:

In a vein in alkaline syenite pegmatite and in kalsilite syenite.

IMA Status:

Approved IMA 1995

Locality:

Murunsky alkaline massif, Aldan shield, Russia. Link to MinDat.org Location Data.

Name Origin:

For Prof. M. M. Odintsova (1911-1979), a founder of the Institute of the Earth's Crust, Irkutsk.

Name Pronunciation:

Odintsovite + Pronunciation

Synonym:

ICSD 39874

IMA1994-052

PDF 47-1872

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Odintsovite Crystallography

Axial Ratios:

a:b:c =1.0918:1:2.5668

Cell Dimensions:

a = 14.243, b = 13.045, c = 33.484, Z = 8; V = 6,221.33 Den(Calc)= 2.92

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: F ddd

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

By Intensity(I/I_o): 2.53(1), 3.16(1), 3.3(1),

Crystal Structure:

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Rastsvetaeva R K , Evsyunin V G , Kashaev A A , Doklady Chemistry , 340 (1995) p.49-51, Crystal structure of a new representative of ring silicates

Physical Properties of Odintsovite

Cleavage:

None

Color:

Colorless, Light pink, Slightly brownish pink.

Density:

2.94 - 2.98, Average = 2.96

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Odintsovite

Gladstone-Dale:

CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2225,KPDmeas= 0.2195,KC= 0.2297
Ncalc = 1.67 - 1.68

Optical Data:

Biaxial (+), a=1.63, b=1.644, g=1.675, bire=0.0450

Calculated Properties of Odintsovite

Electron Density:

Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Odintsovite =2.92 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Odintsovite= 3.88 barns/electron
U=PE_Odintsovite x r_electron= 11.16 barns/cc.

Radioactivity:

GRapi = 81.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Odintsovite per GRapi unit = 1.23 (%)

Estimated Radioactivity from Odintsovite - barely detectable

Odintsovite Classification

Dana Class:

61.01.05.01 (61)Cyclosilicate Six-Membered Rings

(61.01)with [Si6O18] rings; possible (OH) and Al substitution

(61.01.05)Dana Group

61.01.05.01 Odintsovite K2Na4Ca3Ti2Be4Si12O38 F ddd 2/m 2/m 2/m

Strunz Class:

09.CJ.50 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CJ -[Si6O18]12- 6-membered single rings (sechser-Einfachringe),

09.CJ.50 Odintsovite K2Na4Ca3Ti2Be4Si12O38 F ddd 2/m 2/m 2/m

Other Odintsovite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.81,p1014,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Odintsovite :
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
11 - WWW-MINCRYST

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

Odintsovite

K2Na4Ca3Ti2Be4Si12O38
Dana No: 61.01.05.01 Strunz No: 09.CJ.50
Locality:

Notes: