Nefedovite Mineral Data

General Nefedovite Information

Chemical Formula:

Na5Ca4(PO4)4F

Composition:

Molecular Weight = 674.14 gm

Sodium 17.05 % Na 22.98 % Na₂O

Calcium 23.78 % Ca 33.27 % CaO

Phosphorus 18.38 % P 42.11 % P₂O₅

Oxygen 37.97 % O

Fluorine 2.82 % F 2.82 % F

- % F -1.19 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₅Ca₄(PO₄)₄F

Environment:

Pegmatitic segregations in nepheline syenite in a differentiated alkalic massif.

IMA Status:

Approved IMA 1983

Locality:

Mt. Yukspor and from a drillcore in the Kuniok River valley, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Yevgeny I. Nefedov (1910-1976), Russian mineralogist, St. Petersburg, Russia, involved in the discovery of a number of Kola minerals.

Name Pronunciation:

Nefedovite + Pronunciation

Synonym:

ICSD 20906

PDF 37-422

Search for Nefedovite 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.

Nefedovite Crystallography

Axial Ratios:

a:b:c =0.4637:1:1.4153

Cell Dimensions:

a = 5.401, b = 11.647, c = 16.484, Z = 2; alpha = 134.99°, beta = 90.04°, gamma = 89.96° V = 733.35 Den(Calc)= 3.05

Crystal System:

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

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

By Intensity(I/I_o): 2.772(1), 2.29(0.8), 2.508(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Sebals M , Dorokhova G I , Pobedimskaya E A , Khomyakov A P , Doklady Akademii Nauk SSSR , 278 (1984) p.353-357, The crystal structure of nefedovite and its typomorphism

Physical Properties of Nefedovite

Cleavage:

None

Color:

Colorless, White.

Density:

3.01

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Nefedovite

Gladstone-Dale:

CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1903,KPDmeas= 0.1929,KC= 0.1919
Ncalc = 1.58 - 1.59

Optical Data:

Biaxial (+), a=1.571, g=1.59, bire=0.0190

Calculated Properties of Nefedovite

Electron Density:

Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Nefedovite =3.01 gm/cc.

Fermion Index:

Fermion Index = 0.0005032994
Boson Index = 0.9994967006

Photoelectric:

PE_Nefedovite= 4.10 barns/electron
U=PE_Nefedovite x rElectron Density= 12.17 barns/cc.

Radioactivity:

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

Nefedovite Classification

Dana Class:

41.11.04.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.11)with miscellaneous formulae

(41.11.04)Dana Group

41.11.04.01 Nefedovite Na5Ca4(PO4)4F P1 1

Strunz Class:

08.BO.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BO -With only large cations, (OH, etc.):RO4 ³ 1:1

08.BO.30 Nefedovite Na5Ca4(PO4)4F P1 1

Other Nefedovite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Nefedovite :
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
15 - WWW-MINCRYST

Search for Nefedovite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Nefedovite :

A Bijoux Google Search for Nefedovite
Adam's Minerals Google Search for Nefedovite
Cape Minerals Google Search for Nefedovite
Dakota Matrix Minerals Google Search for Nefedovite
Excalibur Mineral Corp. Google Search for Nefedovite
Exceptional Minerals Google Search for Nefedovite
John Betts Fine Minerals Search for Nefedovite
McDougall Minerals Google Search for Nefedovite
Mineral News Website Link
Rock and Mineral Shows Google Search for Nefedovite
Weinrich Minerals, Inc. Google Search for Nefedovite

Ask about Nefedovite 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 Nefedovite Specimen Label here :

Nefedovite

Na5Ca4(PO4)4F
Dana No: 41.11.04.01 Strunz No: 08.BO.30
Locality:

Notes: