Vuonnemite Mineral Data

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General Vuonnemite Information

Chemical Formula:

Na11Nb2TiSi4O12(PO4)2O5F2

Composition:

Molecular Weight = 1,098.85 gm

Sodium 23.01 % Na 31.02 % Na₂O

Titanium 4.36 % Ti 7.27 % TiO₂

Niobium 16.91 % Nb 24.19 % Nb₂O₅

Silicon 10.22 % Si 21.87 % SiO₂

Phosphorus 5.64 % P 12.92 % P₂O₅

Oxygen 36.40 % O

Fluorine 3.46 % F 3.46 % F

- % F -1.46 % -O=F₂

______ ______

100.00 % 99.27 % = TOTAL OXIDE

Empirical Formula:

Na₁₁Nb₂TiSi₄O₁₇(PO₄)₂F₂

Environment:

Albitized alkalic rocks.

IMA Status:

Approved IMA 1973

Locality:

Vuonnemi River, Khibiny massif, Kola Peninsula, Russia. Ilímaussaq, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Vuonnemite + Pronunciation

Synonym:

ICSD 76910

PDF 26-972

Vuonnemite Image

Images:

Vuonnemite Ussingite

Comments: Massive, violet colored ussingite with a single bladed partial crystal of white vuonnemite 1.5 cm in length.
Location: Mt. Karnasurf, Lovozero, Russia. Scale: 4.2 x 3 cm.
© John Veevaert

Images:

Vuonnemite Lorenzenite

Comments: Square vuonnemite crystal with brown, lorenzenite crystals in syenite rock.
Location: Ilimaussaq, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vuonnemite Crystallography

Axial Ratios:

a:b:c =0.7679:1:2.0175

Cell Dimensions:

a = 5.5, b = 7.162, c = 14.45, Z = 1; alpha = 92.63°, beta = 95.33°, gamma = 90.6° V = 566.11 Den(Calc)= 3.22

Crystal System:

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

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

By Intensity(I/I_o): 2.7681(1), 2.8728(1), 4.251(1),

Crystal Structure:

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Ercit T S , Cooper M A , Hawthorne F C , The Canadian Mineralogist , 36 (1998) p.1311-1320, The crystal structure of vuonnemite, Na11TiNb2(Si2O7)2(PO4)2O3(F,OH),, a phosphate-bearing sorosilicate of the lomonosovite group, Locality: Ilimaussaq, Greenland

View Additional jPOWD Structure files for Vuonnemite
[1]

Physical Properties of Vuonnemite

Cleavage:

{001} Perfect, {???} Very Good, {???} Very Good

Color:

Light yellow, Lemon yellow, Greenish yellow.

Density:

3.13

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

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

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Fluorescent, Short UV=greenish yellow, Long UV=pale greenish yellow.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Vuonnemite

Gladstone-Dale:

CI meas= 0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.085 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2042,KPDmeas= 0.2101,KC= 0.2231
Ncalc = 1.7 - 1.72

Optical Data:

Biaxial (+), a=1.636-1.639, b=1.651-1.656, g=1.68-1.683, bire=0.0440

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Vuonnemite

Electron Density:

Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Vuonnemite =3.13 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Vuonnemite= 26.61 barns/electron
U=PE_Vuonnemite x rElectron Density= 80.19 barns/cc.

Radioactivity:

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

Vuonnemite Classification

Dana Class:

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

(56.04)with [Si2O7] with phosphate, water

(56.04.03)Dana Group

56.04.03.01 Vuonnemite Na11Nb2TiSi4O12(PO4)2O5F2 P1 1

Strunz Class:

09.BE.35 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.35 Vuonnemite Na11Nb2TiSi4O12(PO4)2O5F2 P1 1

Other Vuonnemite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Vuonnemite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Ask about Vuonnemite 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
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Vuonnemite Specimen Label here :

Vuonnemite

Na11Nb2TiSi4O12(PO4)2O5F2
Dana No: 56.04.03.01 Strunz No: 09.BE.35
Locality:

Notes: