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Nefedovite

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Dr. Evgeniy Ivanovich Nefedov
Formula:
Na5Ca4(PO4)4F
System:
Triclinic
Hardness:
Name:
Named in honor of Dr. Yevgeny I. Nefedov (1910–1976), Russian mineralogist, St. Petersburg,Russia, involved in the discovery of a number of Kola minerals.
This page provides mineralogical data about Nefedovite.


Classification of Nefedovite

Approved
8.BO.30

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
O : With only large cations, (OH, etc.):RO4 about 1:1
41.11.4.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : Miscellaneous
22.1.7

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride

Physical Properties of Nefedovite

Hardness (Mohs):

Optical Data of Nefedovite

Type:
Biaxial (+)
RI values:
nα = 1.571 nγ = 1.590
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v

Chemical Properties of Nefedovite

Formula:
Na5Ca4(PO4)4F
Elements listed in formula:

Crystallography of Nefedovite

Crystal System:
Triclinic
Cell Parameters:
a = 5.4 Å, b = 11.64 Å, c = 16.48 Å
α = 134.99°, β = 90.04°, γ = 89.96°
Ratio:
a:b:c = 0.464 : 1 : 1.416
Unit Cell Volume:
V 732.60 ų (Calculated from Unit Cell)

Type Occurrence of Nefedovite

Relationship of Nefedovite to other Species

8.BO.05NacaphiteNa2Ca(PO4)F
8.BO.10PreisingeriteBi3O(AsO4)2(OH)
8.BO.10PetitjeaniteBi3O(PO4)2(OH)
8.BO.10SchumacheriteBi3O(VO4)2(OH)
8.BO.15AtelestiteBi2O(AsO4)(OH)
8.BO.15HechtsbergiteBi2O(VO4)(OH)
8.BO.15SmrkoveciteBi2O(OH)PO4
8.BO.20KombatitePb14O9(VO4)2Cl4
8.BO.20SahlinitePb14O9(AsO4)2Cl4
8.BO.25HeneuiteCaMg5(PO4)3(CO3)(OH)
8.BO.35KuznetsoviteHg21+Hg2+(AsO4)Cl
8.BO.40ArtsmithiteHg41+Al(PO4)1.74(OH)1.78
8.BO.45SchlegeliteBi7O4(MoO4)2(AsO4)3
22.1.1AmblygoniteLiAlPO4F
22.1.2LacroixiteNaAl(PO4)F
22.1.3NatrophosphateNa7(PO4)2F · 19H2O
22.1.5NacaphiteNa2Ca(PO4)F
22.1.6ArctiteNa5Ca7Ba(PO4)6F3
22.1.9FluorapatiteCa5(PO4)3F
22.1.10HerderiteCaBePO4F
22.1.11IsokiteCaMgPO4F
22.1.12PanasqueiraiteCaMgPO4(OH)
22.1.13BabefphiteBaBePO4F
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2O
22.1.15MinyuliteKAl2(PO4)2F · 4H2O
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
22.1.17BøggilditeNa2Sr2Al2(PO4)F9
22.1.18FluorstrophiteSrCaSr3(PO4)3F
22.1.19ViitaniemiiteNaCaAlPO4F3
22.1.20VäyryneniteMn2+Be(PO4)OH
22.1.21MaxwelliteNaFe3+AsO4F
22.1.22WagneriteMg2PO4F
22.1.23Triplite(Mn2+,Fe2+)2PO4(F,OH)
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4F
22.1.25ZwieseliteFe2+Mn2+PO4F
22.1.26McauslaniteFe32+Al2(PO4)3(PO3OH)F · 18H2O
22.1.27RichelliteCaFe23+(PO4)2(OH,F)2
22.1.28SvabiteCa5(AsO4)3F
22.1.29TilasiteCaMgAsO4F
22.1.30Johnbaumite-MCa5(AsO4)3OH
22.1.31DurangiteNaAlAsO4F

Other Names for Nefedovite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Nefedovite

Reference List:
American Mineralogist (1984): 69: 812-813.

Internet Links for Nefedovite

mindat.org URL:
https://www.mindat.org/min-2870.html
Please feel free to link to this page.

Localities for Nefedovite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
          • Koashva Mt
Sergey Vasiliev of Systematic Mineralogy (dealer)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Yukspor Mt
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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