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Nacaphite

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Formula:
Na2Ca(PO4)F
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Crystal System:
Monoclinic
It may be in a homologous series with seidozerite, as suggested by some authors.


Hide all sections | Show all sections

Classification of NacaphiteHide

Approved
Approval Year:
1979
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
41.3.6.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
3 : (AB)3(XO4)Zq
22.1.5

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

Physical Properties of NacaphiteHide

Vitreous
Colour:
Colourless
Streak:
White
Hardness:

Optical Data of NacaphiteHide

Type:
Biaxial (-)
RI values:
nα = 1.508 nβ = 1.515 nγ = 1.520
2V:
Measured: 80° , Calculated: 80°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of NacaphiteHide

Formula:
Na2Ca(PO4)F

Crystallography of NacaphiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P1 21/c 1
Cell Parameters:
a = 13.3185(14) Å, b = 7.0964(8) Å, c = 10.6490(11) Å
β = 113.526(1)°
Ratio:
a:b:c = 1.877 : 1 : 1.501
Unit Cell V:
922.81 ų
Z:
8
Comment:
pseudo-orthorhombic C-centred (a = 10.65, b = 24.43, c = 7.10)

Type Occurrence of NacaphiteHide

Synonyms of NacaphiteHide

Other Language Names for NacaphiteHide

German:Nacaphit
Spanish:Nacaphita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Thermonatrite1 photo of Nacaphite associated with Thermonatrite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BO.10PreisingeriteBi3(AsO4)2O(OH)Tric. 1 : P1
8.BO.10PetitjeaniteBi3(PO4)2O(OH)Tric.
8.BO.10SchumacheriteBi3(VO4)2O(OH)Tric.
8.BO.15AtelestiteBi2(AsO4)O(OH)Mon. 2/m
8.BO.15HechtsbergiteBi2(VO4)O(OH)Mon. 2/m : P21/b
8.BO.15SmrkoveciteBi2(PO4)O(OH)Mon. 2/m : P21/b
8.BO.20KombatitePb14(VO4)2O9Cl4Mon.
8.BO.20SahlinitePb14(AsO4)2O9Cl4Mon.
8.BO.25HeneuiteCaMg5(CO3)(PO4)3(OH)Tric. 1 : P1
8.BO.30NefedoviteNa5Ca4(PO4)4FTric.
8.BO.35Kuznetsovite(Hg+2)Hg2+(AsO4)ClIso. 2 3 : P21 3
8.BO.40Artsmithite(Hg+2)2Al(PO4)1.74(OH)1.78Mon. 2/m : B2/b
8.BO.45SchlegeliteBi7(AsO4)3(MoO4)2O4Orth. mmm (2/m 2/m 2/m)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.1.1AmblygoniteLiAl(PO4)FTric. 1 : P1
22.1.2LacroixiteNaAl(PO4)FMon. 2/m : B2/b
22.1.3NatrophosphateNa7(PO4)2F · 19H2OIso. m3m (4/m 3 2/m) : Fd3c
22.1.6ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m
22.1.7NefedoviteNa5Ca4(PO4)4FTric.
22.1.9FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
22.1.10HerderiteCaBePO4(F,OH)Mon. 2/m
22.1.11IsokiteCaMg(PO4)FMon. 2/m : B2/b
22.1.12PanasqueiraiteCaMg(PO4)(OH,F)Mon.
22.1.13BabefphiteBaBePO4(F,OH)Tet.
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2OOrth. mmm (2/m 2/m 2/m) : Fddd
22.1.15MinyuliteKAl2(PO4)2(OH,F) · 4H2OOrth. mm2 : Pba2
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2OMon. 2/m
22.1.17BøggilditeNa2Sr2Al2PO4F9Mon.
22.1.18FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
22.1.19ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3Mon.
22.1.20VäyryneniteMn2+Be(PO4)(OH,F)Mon. 2/m : P21/b
22.1.21MaxwelliteNaFe3+(AsO4)FMon.
22.1.22Wagnerite(Mg,Fe2+)2(PO4)FMon. 2/m : P21/b
22.1.23Triplite(Mn2+,Fe2+)2(PO4)(F,OH)Mon. 2/m
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4FMon.
22.1.25Zwieselite(Fe2+,Mn2+)2(PO4)FMon. 2/m : P21/b
22.1.26McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2OTric.
22.1.27RichelliteCaFe3+2(PO4)2(OH,F)2Amor.
22.1.28SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
22.1.29TilasiteCaMg(AsO4)FMon. m : Bb
22.1.30Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
22.1.31DurangiteNaAl(AsO4)FMon. 2/m : B2/b

Other InformationHide

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 NacaphiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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).
Sokolova, E. and Hawthorne, F.C. (2001) The crystal chemistry of the [M3φ11–14] trimeric structures: from hyperagpaitic complexes to saline lakes. Canadian Mineralogist: 39: 1275–1294.
Jambor, J.L. and Roberts, A.C. (2002) New mineral names. American Mineralogist 87, 765-768.
Krivovichev, S.V., Yakovenchuk, V.N., Ivanyuk, G.Yu., Pakhomovsky, Ya.A., Armbruster, T., and Selivanova, E.A. (2007) The crystal structure of nacaphite, Na2Ca(PO4)F: a re-investigation. Canadian Mineralogist, 45, 915-920.

Internet Links for NacaphiteHide

Localities for NacaphiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Koashva Mt
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
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; Belakovskiy D, Smith D G W, Welch M (2013) New mineral names. American Mineralogist 98, 811-815
          • Rasvumchorr Mine
P.M. Kartashov data
Pekov I.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. (2010): Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia. Zapiski RMO, 139(1), 37-50.
www.koeln.netsurf.de/~w.steffens/lovo.htm
Pakhomovsky, Y. A., Ivanyuk, G. Y., & Yakovenchuk, V. N. (2014). Loparite-(Ce) in rocks of the Lovozero layered complex at Mt. Karnasurt and Mt. Kedykvyrpakhk. Geology of Ore Deposits, 56(8), 685-698.
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