Quadruphite-VIII Mineral Data

[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Quadruphite-VIII 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-VIII + Pronunciation

Synonym:

IMA1990-026

Search for Quadruphite-VIII Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Quadruphite-VIII 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 - PedialH-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-VIII

Color:

Brown.

Density:

3.12

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Vitreous - Resinous

Optical Properties of Quadruphite-VIII

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

Calculated Properties of Quadruphite-VIII

Electron Density:

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

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

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

Radioactivity:

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

Quadruphite-VIII Classification

Dana Class:

56.04.01.03 (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

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-VIII Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.78,p1316,1993) OPTIC PROP.(Am.Min.,Vol.78,p1316,1993)

See Also:

Links to other databases for Quadruphite-VIII :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Quadruphite-VIII using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Quadruphite-VIII :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Quadruphite-VIII Mineral Data :

Ask about Quadruphite-VIII here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Quadruphite-VIII

Na14CaMgTi4(Si2O7)2(PO4)4O4F2
Dana No: 56.04.01.03 Strunz No: 09.BE.45
Locality:

Notes: