Sobolevite Mineral Data (original) (raw)

General Sobolevite Information

Help on Chemical Formula: Chemical Formula:

Na11(Na,Ca)4(Mg,Mn)Ti++++4(Si4O12)(PO4)4O5F3

Help on Composition: Composition:

Molecular Weight = 1,378.43 gm

Sodium 22.52 % Na 30.35 % Na2O

Calcium 4.65 % Ca 6.51 % CaO

Magnesium 0.35 % Mg 0.58 % MgO

Titanium 9.38 % Ti 15.65 % TiO2

Manganese 3.19 % Mn 4.12 % MnO

Niobium 3.37 % Nb 4.82 % Nb2O5

Iron 0.41 % Fe 0.52 % FeO

Silicon 8.15 % Si 17.44 % SiO2

Phosphorus 8.76 % P 20.08 % P2O5

Oxygen 38.54 % O

Fluorine 0.69 % F 0.69 % F

- % F -0.29 % -O=F2

______ ______

100.00 % 100.46 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na13.5Ca1.6Mn2+0.8Mg0.2Fe2+0.1Ti2.7Nb0.5P3.9Si4O33.2F0.5

Help on Environment: Environment:

In alkalic pegmatite, cutting sodalite-cancrinite syenite, in a differentiated alkalic massif.

Help on IMA Status: IMA Status:

Approved IMA 1983

Help on Locality: Locality:

On Mt. Alluaiv, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Vladimir S. Sobolev (1908-1982), Soviet petrologist and former President of the Internatinal Mineralogical Association.

Help on Name Pronunciation: Name Pronunciation:

Sobolevite + Pronunciation Say SOBOLEVITE

Help on Synonym: Synonym:

ICSD 63419

PDF 36-349

Sobolevite Image

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Sobolevite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.3079:1:7.5058

Help on Cell Dimensions: Cell Dimensions:

a = 7.078, b = 5.4115, c = 40.618, Z = 2; alpha = 90.01°, beta = 93.19°, gamma = 90° V = 1,553.36 Den(Calc)= 2.95

Help on Crystal System: Crystal System:

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

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.896(1), 2.691(0.7), 2.913(0.5),

Click Here for Large Sobolevite Structure Window Crystal Structure:

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| | Sokolova E , Hawthorne F C , Khomyakov A P , The Canadian Mineralogist , 43 (2005) p.1527-1544, Polyphite and sobolevite: Revision of their crystal structures, Locality: Khibina-Lovozero alkaline complex, Kola peninsula, Russia | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Sobolevite

Help on Cleavage: Cleavage:

{001} Perfect, {110} Distinct

Help on Color: Color:

Brown.

Help on Density: Density:

3.03

Help on Diaphaneity: Diaphaneity:

Semitransparent

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Habit: Habit:

Platy - Sheet forms (e.g. micas).

Help on Hardness: Hardness:

4.5-5 - Near Apatite

Help on Luster: Luster:

Resinous

Help on Streak: Streak:

yellowish brown

Optical Properties of Sobolevite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.039 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2263,KPDmeas= 0.2204,KC= 0.2293
Ncalc = 1.68 - 1.69

Help on Optical Data: Optical Data:

Biaxial (-), a=1.627, b=1.686, g=1.69, bire=0.0630, 2V(Calc)=28, 2V(Meas)=25-33. Dispersion r < v strong.

Help on Pleochroism (x): Pleochroism (x):

nearly colorless.

Help on Pleochroism (y): Pleochroism (y):

yellowish brown.

Help on Pleochroism (z): Pleochroism (z):

yellowish brown.

Calculated Properties of Sobolevite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Sobolevite =2.95 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PESobolevite = 9.06 barns/electron
U=PESobolevite x rElectron Density= 25.97 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sobolevite is Not Radioactive

Sobolevite Classification

Help on Dana Class: Dana Class:

56.04.01.04 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.04)with [Si2O7] with phosphate, water

(56.04.01)Lomonosovite group

56.04.01.01 Lomonosovite Na5Ti2O2(Si2O7)(PO4) P1 1

56.04.01.02 Polyphite-VIII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1

56.04.01.03 Quadruphite-VIII Na14CaMgTi4(Si2O7)2(PO4)4O4F2 P1 1

56.04.01.04 Sobolevite Na11(Na,Ca)4(Mg,Mn)Ti4(Si4O12)(PO4)4O5F3 P1 1

Help on Strunz Class: Strunz Class:

09.BE.37 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.37 Sobolevite Na11(Na,Ca)4(Mg,Mn)Ti4(Si4O12)(PO4)4O5F3 P1 1

Other Sobolevite Information

Help on References: References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

Help on See Also: See Also:

Links to other databases for Sobolevite :
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

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Ask about Sobolevite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Sobolevite Specimen Label here :

Sobolevite

Na11(Na,Ca)4(Mg,Mn)Ti++++4(Si4O12)(PO4)4O5F3
Dana No: 56.04.01.04 Strunz No: 09.BE.37
Locality:

Notes: