Mineralogy Database

Nefedovite Mineral Data

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General Nefedovite Information

Help on Chemical  Formula: Chemical Formula: Na5Ca4(PO4)4F
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na5Ca4(PO4)4F
Help on Environment: Environment: Pegmatitic segregations in nepheline syenite in a differentiated alkalic massif.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Mt. Yukspor and from a drillcore in the Kuniok River valley, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Yevgeny I. Nefedov (1910-1976), Russian mineralogist, St. Petersburg, Russia, involved in the discovery of a number of Kola minerals.
Help on Name Pronunciation: Name Pronunciation: Nefedovite + Pronunciation Say NEFEDOVITE
Help on Synonym: Synonym: ICSD 20906
  PDF 37-422

Nefedovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4637:1:1.4153
Help on Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.772(1), 2.29(0.8), 2.508(0.8),

Physical Properties of Nefedovite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.01
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Nefedovite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Biaxial (+), a=1.571, g=1.59, bire=0.0190

Calculated Properties of Nefedovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Nefedovite =3.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005032994
Boson Index = 0.9994967006
Help on Photoelectric: Photoelectric: PENefedovite = 4.10 barns/electron
U=PENefedovite x rElectron Density= 12.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nefedovite is Not Radioactive

Nefedovite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.11)with miscellaneous formulae
  (41.11.04)Dana Group Nefedovite Na5Ca4(PO4)4F P1 1
Help on  Strunz Class: 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 � 1:1
08.BO.30 Nefedovite Na5Ca4(PO4)4F P1 1

Other Nefedovite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Dana No: Strunz No: 08.BO.30





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