Polyphite-VIII Mineral Data

Polyphite-VIII Mineral Data
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General Polyphite-VIII Information

Help on Chemical Formula: Chemical Formula: Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6
Help on Composition: Composition: Molecular Weight = 1,786.09 gm
   Sodium      21.88 %  Na   29.50 % Na2O
   Calcium      6.73 %  Ca    9.42 % CaO
   Magnesium    1.36 %  Mg    2.26 % MgO
   Titanium     8.04 %  Ti   13.42 % TiO2
   Manganese    3.08 %  Mn    4.42 % Mn2O3
   Silicon      6.29 %  Si   13.46 % SiO2
   Phosphorus  10.40 %  P    23.84 % P2O5
   Oxygen      35.83 %  O
   Fluorine     6.38 %  F     6.38 % F
                 -   %   F    -2.69 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na17Ca3MgTi3Mn3+(Si2O7)2(PO4)6O2F6
Help on Environment: Environment: In ultra-agpaitic pegmatites in a differentiated alkaline massif.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Lovozero alkaline complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "many" and PHosphorus for the multiple phosphate anions in the formula.
Help on Name Pronunciation: Name Pronunciation: Polyphite-VIII + Pronunciation Say POLYPHITE-VIII
Help on Synonym: Synonym: IMA1990-025
 

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Polyphite-VIII Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7645:1:3.7519
Help on Cell Dimensions: Cell Dimensions: a = 5.412, b = 7.079, c = 26.56, Z = 1; alpha = 95.21°, beta = 93.51°, gamma = 90.1° V = 1,011.45 Den(Calc)= 2.93
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): 2.937(1), 2.702(0.9), 2.659(0.8),
 

Physical Properties of Polyphite-VIII

Help on Color: Color: Brown.
Help on Density: Density: 3.07
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Resinous
 

Optical Properties of Polyphite-VIII

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.22,KPDmeas= 0.21,KC= 0.221
Ncalc = 1.65 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.6, b=1.658, g=1.676, bire=0.0760, 2V(Calc)=56, 2V(Meas)=56.
 

Calculated Properties of Polyphite-VIII

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Polyphite-VIII =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPolyphite-VIII = 4.09 barns/electron
U=PEPolyphite-VIII x rElectron Density= 11.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Polyphite-VIII is Not Radioactive
 

Polyphite-VIII Classification
Help on Dana Class: Dana Class: 56.04.01.02 (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.407. 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.407. Polyphite-VIII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1
 

Other Polyphite-VIII Information
Help on References: References: PHYS. PROP.(Am.Min.,Vol.78,p1316,1993) OPTIC PROP.(Am.Min.,Vol.78,p1316,1993)
Help on See Also: See Also: Links to other databases for Polyphite-VIII :
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

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Print or Cut-and-Paste your Polyphite-VIII Specimen Label here :

Polyphite-VIII

Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6
Dana No: 56.04.01.02 Strunz No: 09.BE.407.
Locality:

 

Notes: