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Sobolevite Mineral Data

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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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Comments: Translucent crystalline sobolevite cleavage.
Location: Mount Alluaiv, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - Pedial H-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),

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)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.04)with [Si2O7] with phosphate, water
  (56.04.01)Lomonosovite group Lomonosovite Na5Ti2O2(Si2O7)(PO4) P1 1 Polyphite-VIII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1 Quadruphite-VIII Na14CaMgTi4(Si2O7)2(PO4)4O4F2 P1 1 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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Dana No: Strunz No: 09.BE.37





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