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Nefedovite

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Big Photo

Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Norman King




Formula:
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
System:TriclinicHardness:4½
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

IMA status:Approved
Strunz 8th edition ID:7/B.21-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:41.11.4.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : Miscellaneous
Hey's CIM Ref.:22.1.7

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
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Type Occurrence of Nefedovite

Co-type Localities:Kuniok Valley, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Material'naya Adit, Yukspor Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1983

Physical Properties of Nefedovite

Hardness (Mohs):4½

Crystallography of Nefedovite

Crystal System:Triclinic
Cell Parameters:a = 5.4Å, b = 11.64Å, c = 16.48Å
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)

Optical Data of Nefedovite

Type:Biaxial (+)
RI values: nα = 1.571 nγ = 1.590
Maximum Birefringence:δ = 0.019

Chart 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:
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
Essential elements:Ca, F, Na, O, P
All elements listed in formula:Ca, F, Na, O, P

Relationship of Nefedovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BO.05Nacaphite
Na
 
2
Ca(PO
 
4
)F
8.BO.10Preisingerite
Bi
 
3
(AsO
 
4
)
 
2
O(OH)
8.BO.10Petitjeanite
Bi
 
3
(PO
 
4
)
 
2
O(OH)
8.BO.10Schumacherite
Bi
 
3
(VO
 
4
)
 
2
O(OH)
8.BO.15Atelestite
Bi
 
2
(AsO
 
4
)O(OH)
8.BO.15Hechtsbergite
Bi
 
2
(VO
 
4
)O(OH)
8.BO.15Smrkovecite
Bi
 
2
(PO
 
4
)O(OH)
8.BO.20Kombatite
Pb
 
14
(VO
 
4
)
 
2
O
 
9
Cl
 
4
8.BO.20Sahlinite
Pb
 
14
(AsO
 
4
)
 
2
O
 
9
Cl
 
4
8.BO.25Heneuite
CaMg
 
5
(CO
 
3
)(PO
 
4
)
 
3
(OH)
8.BO.35Kuznetsovite
(Hg
+
2
)Hg
2+
 
(AsO
 
4
)Cl
8.BO.40Artsmithite
(Hg
+
2
)
 
2
Al(PO
 
4
)
 
1.74
(OH)
 
1.78
8.BO.45Schlegelite
Bi
 
7
(AsO
 
4
)
 
3
(MoO
 
4
)
 
2
O
 
4
Related Minerals - Hey's Index Grouping:

- +
22.1.1Amblygonite
LiAl(PO
 
4
)F
22.1.2Lacroixite
NaAl(PO
 
4
)F
22.1.3Natrophosphate
Na
 
7
(PO
 
4
)
 
2
F · 19H
 
2
O
22.1.5Nacaphite
Na
 
2
Ca(PO
 
4
)F
22.1.6Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
22.1.9Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
22.1.10Herderite
CaBePO
 
4
(F,OH)
22.1.11Isokite
CaMg(PO
 
4
)F
22.1.12Panasqueiraite
CaMg(PO
 
4
)(OH,F)
22.1.13Babefphite
BaBePO
 
4
(F,OH)
22.1.14Fluellite
Al
 
2
(PO
 
4
)(OH)F
 
2
 · 7H
 
2
O
22.1.15Minyulite
KAl
 
2
(PO
 
4
)
 
2
(OH,F) · 4H
 
2
O
22.1.16Morinite
Na
 
2
Ca
 
4
Al
 
4
(PO
 
4
)
 
4
(F,OH)
 
10
 · 3H
 
2
O
22.1.17Bøggildite
Na
 
2
Sr
 
2
Al
 
2
PO
 
4
F
 
9
22.1.18Fluorstrophite
SrCaSr
 
3
(PO
 
4
)
 
3
F
22.1.19Viitaniemiite
Na(Ca,Mn
2+
 
)Al(PO
 
4
)(F,OH)
 
3
22.1.20Väyrynenite
Mn
2+
 
BePO
 
4
(OH,F)
22.1.21Maxwellite
NaFe
3+
 
(AsO
 
4
)F
22.1.22Wagnerite
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)F
22.1.23Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(F,OH)
22.1.24Magniotriplite
(Mg,Fe
2+
 
,Mn
2+
 
)
 
2
PO
 
4
F
22.1.25Zwieselite
Fe
2+
 
Mn
2+
 
(PO
 
4
)F
22.1.26Mcauslanite
HFe
2+
3
Al
 
2
(PO
 
4
)
 
4
F · 18H
 
2
O
22.1.27Richellite
CaFe
3+
2
(PO
 
4
)
 
2
(OH,F)
 
2
22.1.28Svabite
Ca
 
5
(AsO
 
4
)
 
3
F
22.1.29Tilasite
CaMg(AsO
 
4
)F
22.1.30Johnbaumite-M
Ca
 
5
(AsO
 
4
)
 
3
OH
22.1.31Durangite
NaAl(AsO
 
4
)F

Other Names for Nefedovite

Synonyms:
IMA1982-048
Other Languages:
German:Nefedovit
Russian:Нефедовит
Spanish:Nefedovita

Other Information

Health Warning: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

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Nefedovite details from Handbook of Mineralogy (PDF)
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    • Localities for Nefedovite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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
    		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
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