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Nefedovite

Formula:
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
System:TriclinicHardness:4½
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[F|PO
 
4
]
8.BO.10Preisingerite
Bi
 
3
[O|OH|(AsO
 
4
)
 
2
]
8.BO.10Petitjeanite
Bi
 
3
[O|OH|(PO
 
4
)
 
2
]
8.BO.10Schumacherite
Bi
 
3
[O|OH|(VO
 
4
)
 
2
]
8.BO.15Atelestite
Bi
 
8
[O
 
5
|(OH)
 
5
|(AsO
 
4
)
 
3
]
8.BO.15Hechtsbergite
Bi
 
2
[O|OH|VO
 
4
]
8.BO.15Smrkovecite
Bi
 
2
[O|OH|PO
 
4
]
8.BO.20Kombatite
Pb
 
14
[O
 
9
|(VO
 
4
)
 
2
|Cl
 
4
]
8.BO.20Sahlinite
Pb
 
14
[O
 
9
|(AsO
 
4
)
 
2
|Cl
 
4
]
8.BO.25Heneuite
CaMg
 
5
(CO
 
3
)(PO
 
4
)
 
3
OH
8.BO.35Kuznetsovite
(Hg-Hg)Hg
2+
 
[Cl|AsO
 
4
]
8.BO.40Artsmithite
(Hg-Hg)
2+
2
Al[(OH)
 
1+3x
|(PO
 
4
)
 
2-x
] (x ≈ 0.26)
8.BO.45Schlegelite
Bi
 
7
[O
 
4
|(MoO
 
4
)
 
2
|(AsO
 
4
)
 
3
]
Related Minerals - Hey's Index Grouping:
22.1.1Amblygonite
(Li,Na)Al[(F,OH)|PO
 
4
]
22.1.2Lacroixite
NaAl[F|PO
 
4
]
22.1.3Natrophosphate
Na
 
7
(PO
 
4
)
 
2
F·19H
 
2
O
22.1.5Nacaphite
Na
 
2
Ca[F|PO
 
4
]
22.1.6Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
22.1.9Apatite-(CaF)
Ca
 
5
[F|(PO
 
4
)
 
3
]
22.1.10Herderite
CaBe[(F,OH)|PO
 
4
]
22.1.11Isokite
CaMg[F|PO
 
4
]
22.1.12Panasqueiraite
CaMg[(OH,F)|PO
 
4
]
22.1.13Babefphite
BaBe[(F,OH)|PO
 
4
]
22.1.14Fluellite
Al
 
2
[F
 
2
|OH|PO
 
4
] · 7H
 
2
O
22.1.15Minyulite
KAl
 
2
[(OH,F)|(PO
 
4
)
 
2
] · 4H
 
2
O
22.1.16Morinite
Na
 
2
Ca
 
4
Al
 
4
[(F,OH)
 
5
|(PO
 
4
)
 
2
]
 
2
 · 3H
 
2
O
22.1.17Bøggildite
Na
 
2
Sr
 
2
Al
 
2
PO
 
4
F
 
9
22.1.18Apatite-(SrOH)
(Sr,Ca)
 
5
(PO
 
4
)
 
3
(OH,F)
22.1.19Viitaniemiite
Na(Ca,Mn
2+
 
)Al[(F,OH)
 
3
|PO
 
4
]
22.1.20Väyrynenite
Mn
2+
 
Be[(OH,F)|PO
 
4
]
22.1.21Maxwellite
NaFe
3+
 
[F|AsO
 
4
]
22.1.22Wagnerite
(Mg,Fe
2+
 
)
 
2
[F|PO
 
4
]
22.1.23Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
[(F,OH)|PO
 
4
]
22.1.24Magniotriplite
(Mg,Fe
2+
 
,Mn
2+
 
)
 
2
[F|PO
 
4
]
22.1.25Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
[F|PO
 
4
]
22.1.26Mcauslanite
HFe
2+
3
Al
 
2
[F|(PO
 
4
)
 
4
] · 18H
 
2
O
22.1.27Richellite
Ca
 
3
Fe
3+
10
[(OH,F)
 
3
|(PO
 
4
)
 
2
]
 
4
 · nH
 
2
O (not confirmed)
22.1.28Svabite
Ca
 
5
[(F,Cl,OH)|(AsO
 
4
)
 
3
]
22.1.29Tilasite
CaMg[F|AsO
 
4
]
22.1.30Fermorite
(Ca,Sr)
 
5
(AsO
 
4
,PO
 
4
)
 
3
(OH)
22.1.31Durangite
NaAl[F|AsO
 
4
]

Other Names for Nefedovite

Synonyms:
IMA1982-048
German names:
Nefedovit
Russian names:
Нефедовит
Spanish names:
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

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  • Raman and XRD data at RRUFF project
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    Localities for Nefedovite

    (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
            • Yukspor Mt
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