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Nacaphite

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Big Photo

Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© 2008, JGW

Show Nacaphite Photos (2)



Formula:
Na
 
2
Ca(PO
 
4
)F
System:TriclinicColour:Colourless
Lustre:VitreousHardness:3
This page provides mineralogical data about Nacaphite.

Classification of Nacaphite

IMA status:Approved 1979
Strunz 8th edition ID:7/B.25-60
Nickel-Strunz 10th (pending) edition ID:8.BO.05

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:41.3.6.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
3 : (AB)3(XO4)Zq
Hey's CIM Ref.:22.1.5

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

Type Locality:Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1979

Physical Properties of Nacaphite

Lustre:Vitreous
Colour:Colourless
Streak:White
Hardness (Mohs):3

Crystallography of Nacaphite

Crystal System:Triclinic
Class (H-M):1 - Pedial
Space Group:P1
Cell Parameters:a = 10.64Å, b = 24.42Å, c = 7.08Å
Ratio:a:b:c = 0.436 : 1 : 0.29
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)

Optical Data of Nacaphite

Type:Biaxial (-)
RI values: nα = 1.508 nβ = 1.515 nγ = 1.520
2V:Measured: 80° , Calculated: 80°
Maximum Birefringence:δ = 0.012

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Nacaphite

Formula:
Na
 
2
Ca(PO
 
4
)F
Essential elements:Ca, F, Na, O, P
All elements listed in formula:Ca, F, Na, O, P

Relationship of Nacaphite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
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.30Nefedovite
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
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
22.1.6Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
22.1.7Nefedovite
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
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
NaCa
 
2
Al
 
2
(PO
 
4
)
 
2
(OH)F
 
4
 · 2H
 
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+
 
Be(PO
 
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 Nacaphite

Synonyms:
IMA1979-026
Other Languages:
German:Nacaphit
Russian:Накафит
Spanish:Nacaphita

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 Nacaphite

Reference List:

- +
American Mineralogist (1981): 66: 218.

American Mineralogist (1991): 76: 305.

Doklady Rossiiskoi Akademii Nauk: 304: 610-615.

Sokolova, E., Egorov-Tismenko, Yu.K., and Khomyakov, A.P. (1989) Crystal structure of nacaphite. Soviet Physics – Doklady: 34: 9-11.

Egorov-Tismenko, Yu.K. and Sokolova, E.V. (1990) Homologous series seidozerite-nacaphite. Mineralogicheskii Zhurnal, Kiev: 12(1): 40-49 (in Russian).

Sokolova, E.V. (1998) Polysomatic series seidozerite-nacaphite. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 127(2): 111-114 (in Russian).

Krivovichev, S.V., Yakovenchuk, V.N., Ivanyuk, G.Yu., Pakhomovsky, Ya.A., Armbruster, T., Selivanova, E.A. (2007): The crystal structure of nacaphite, Na2Ca(PO4)F: a re-investigation. Canadian Mineralogist, 45, 915-920.

Internet Links for Nacaphite

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    • Localities for Nacaphite

    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.
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    (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
    		33 IGC excursion No 47, July 22 – August 2, 2008 Stop 2-2
            • Kukisvumchorr Mt
    		No reference listed
    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
    P.M. Kartashov data
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    Mineral and/or Locality
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