Quadruphite-VII Mineral Data

General Quadruphite-VII Information

Chemical Formula:

Na14CaMgTi4[Si2O7]2(PO4)4O4F2

Composition:

Molecular Weight = 1,395.97 gm

Sodium 23.06 % Na 31.08 % Na₂O

Calcium 2.87 % Ca 4.02 % CaO

Magnesium 1.74 % Mg 2.89 % MgO

Titanium 13.72 % Ti 22.89 % TiO₂

Silicon 8.05 % Si 17.22 % SiO₂

Phosphorus 8.88 % P 20.34 % P₂O₅

Oxygen 38.97 % O

Fluorine 2.72 % F 2.72 % F

- % F -1.15 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₁₄CaMgTi₄(Si₂O₇)₂(PO₄)₄O₄F₂

IMA Status:

Approved IMA 1992

Locality:

Mt. Alluaiv in the NW part of the Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the Latin "quadruplex" and the element phosphorus, for the quantity of PO4 groups in the formula.

Name Pronunciation:

Quadruphite-VII + Pronunciation

Synonym:

IMA1990-026

Quadruphite-VII Crystallography

Axial Ratios:

a:b:c =0.7647:1:2.8724

Cell Dimensions:

a = 5.415, b = 7.081, c = 20.34, Z = 1; alpha = 86.85°, beta = 94.4°, gamma = 89.94° V = 776.44 Den(Calc)= 2.99

Crystal System:

Triclinic - Pedial H-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 2.88(1), 2.702(0.8), 2.636(0.7),

Physical Properties of Quadruphite-VII

Color:

Brown.

Density:

3.12

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Vitreous - Resinous

Optical Properties of Quadruphite-VII

Gladstone-Dale:

CI meas= 0.098 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.059 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2235,KPDmeas= 0.2142,KC= 0.2375
Ncalc = 1.71 - 1.74

Optical Data:

Biaxial (-), a=1.63, b=1.678, g=1.697, bire=0.0670, 2V(Calc)=62, 2V(Meas)=62.

Calculated Properties of Quadruphite-VII

Electron Density:

Bulk Density (Electron Density)=2.91 gm/cc
note: Specific Gravity of Quadruphite-VII =2.99 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Quadruphite-VII}= 3.76 barns/electron
U=PE_{Quadruphite-VII} x rElectron Density= 10.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Quadruphite-VII is Not Radioactive

Quadruphite-VII Classification

Dana Class:

43.05.19.01 (43)Compound Phosphates, etc.

(43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.05.19)Dana Group

43.05.19.01 Quadruphite-VII Na14CaMgTi4[Si2O7]2(PO4)4O4F2 P1 1

Strunz Class:

09.BE.45 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.45 Quadruphite-VII Na14CaMgTi4[Si2O7]2(PO4)4O4F2 P1 1

09.BE.45 Quadruphite-VIII Na14CaMgTi4(Si2O7)2(PO4)4O4F2 P1 1

09.BE.45 Polyphite-VII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1

Other Quadruphite-VII Information

References:

PHYS. PROP.(Am.Min.,Vol.78,p1316,1993) OPTIC PROP.(Am.Min.,Vol.78,p1316,1993)

See Also:

Links to other databases for Quadruphite-VII :
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 Quadruphite-VII Specimen Label here :

Quadruphite-VII

Na14CaMgTi4[Si2O7]2(PO4)4O4F2
Dana No: 43.05.19.01 Strunz No: 09.BE.45
Locality:

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