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Arctite

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Formula:
Na2Ca4(PO4)3F
System:
Trigonal
Colour:
Colorless:
Lustre:
Vitreous, Sub-Vitreous, Pearly
Hardness:
5
Name:
Named in 1981 by Alexander Petrovich Khomyyakov, A. V. Bykova, and T. A. Kurova for the type locality's area, the Arctic region of Russia.
There is a structural relation to nabimusaite (and thus to nabimusaite-dargaite series): arctite-nabimusaite type triple layers of {[W3B12](TO4)4} composition are mentioned by Galuskin et al. (2016).


Classification of Arctite

Approved
8.BN.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
41.5.18.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
22.1.6

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

Physical Properties of Arctite

Vitreous, Sub-Vitreous, Pearly
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colorless:
Streak:
Colorless
Hardness (Mohs):
5
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
Density:
3.13 g/cm3 (Measured)    3.19 g/cm3 (Calculated)

Optical Data of Arctite

Type:
Uniaxial (-)
RI values:
nω = 1.578 nε = 1.577
Birefringence:
0.001
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic
Comments:
Anomalously biaxial

Chemical Properties of Arctite

Formula:
Na2Ca4(PO4)3F
IMA Formula:
Na5Ca7Ba(PO4)6F3
Elements listed in formula:

Crystallography of Arctite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Space Group Setting:
R3m
Cell Parameters:
a = 7.078 Å, c = 41.203 Å
Ratio:
a:c = 1 : 5.821
Unit Cell Volume:
V 1,787.64 ų (Calculated from Unit Cell)
Z:
6
X-Ray Powder Diffraction Data:
d-spacingIntensity
13.80 (25)
3.54 (21)
3.43 (32)
3.06 (25)
2.804 (25)
2.746 (100)
2.719 (21)
1.769 (20)
Comments:
ICDD 33-1228

Type Occurrence of Arctite

General Appearance of Type Material:
Colorless to white masses and rare crystals.
Geological Setting of Type Material:
Alkaline massif

Relationship of Arctite to other Species

8.BN.05AlforsiteBa5(PO4)3Cl
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3F
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)
8.BN.05ChlorapatiteCa5(PO4)3Cl
8.BN.05Mimetite-MPb5(AsO4)3Cl
8.BN.05Johnbaumite-MCa5(AsO4)3OH
8.BN.05FluorapatiteCa5(PO4)3F
8.BN.05HedyphaneCa2Pb3(AsO4)3Cl
8.BN.05HydroxylapatiteCa5(PO4)3(OH)
8.BN.05JohnbaumiteCa5(AsO4)3OH
8.BN.05MimetitePb5(AsO4)3Cl
8.BN.05MorelanditeCa2Ba3(AsO4)3Cl
8.BN.05PyromorphitePb5(PO4)3Cl
8.BN.05FluorstrophiteSrCaSr3(PO4)3F
8.BN.05SvabiteCa5(AsO4)3F
8.BN.05TurneaureiteCa5(AsO4)3Cl
8.BN.05VanadinitePb5(VO4)3Cl
8.BN.05Belovite-(La)NaLaSr3(PO4)3F
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5
8.BN.05FluorcaphiteSrCaCa3(PO4)3F
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5
8.BN.05Hydroxylapatite-MCa5(PO4)3OH
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3Cl
8.BN.05StronadelphiteSr5(PO4)3F
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3F
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3F
8.BN.05Miyahisaite(Sr,Ca)2Ba3(PO4)3F
22.1.1AmblygoniteLiAl(PO4)F
22.1.2LacroixiteNaAl(PO4)F
22.1.3NatrophosphateNa7(PO4)2F · 19H2O
22.1.5NacaphiteNa2Ca(PO4)F
22.1.7NefedoviteNa5Ca4(PO4)4F
22.1.9FluorapatiteCa5(PO4)3F
22.1.10HerderiteCaBePO4(F,OH)
22.1.11IsokiteCaMg(PO4)F
22.1.12PanasqueiraiteCaMg(PO4)(OH,F)
22.1.13BabefphiteBaBePO4(F,OH)
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2O
22.1.15MinyuliteKAl2(PO4)2(OH,F) · 4H2O
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
22.1.17BøggilditeNa2Sr2Al2PO4F9
22.1.18FluorstrophiteSrCaSr3(PO4)3F
22.1.19ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3
22.1.20VäyryneniteMn2+Be(PO4)(OH,F)
22.1.21MaxwelliteNaFe3+(AsO4)F
22.1.22Wagnerite(Mg,Fe2+)2(PO4)F
22.1.23Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4F
22.1.25Zwieselite(Fe2+,Mn2+)2(PO4)F
22.1.26McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2O
22.1.27RichelliteCaFe23+(PO4)2(OH,F)2
22.1.28SvabiteCa5(AsO4)3F
22.1.29TilasiteCaMg(AsO4)F
22.1.30Johnbaumite-MCa5(AsO4)3OH
22.1.31DurangiteNaAl(AsO4)F

Other Names for Arctite

Name in Other Languages:
Russian:Арктит
Spanish:Arctita

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 Arctite

Reference List:
Khomyakov, A. P., Bykova, A. V. & Kurova, T. A. (1981) Arctite [Na2Ca4(PO4)3F] - a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 110, 506-508.

Fleischer, M., Cabri, L.J., Chao, G.Y., Mandarino, J.A., Pabst, A. (1982) New mineral names. American Mineralogist: 67: 621-624.

Sokolova, E.V., Yamnova, N.A., Egorov-Tismenko, Y.K., Khomyakov, A.P. (1984) Crystal structure of arctite, a new sodium calcium barium phosphate (Na5Ca)Ca6Ba[PO4]6F3. Soviet Physics - Doklady: 29: 5-8.

Sokolova, E.V., Yamnova, N.A., Egorov-Tismenko, Y.K., Khomyakov, A.P. (1984) The crystal structure of a new phosphate of Na, Ca and Ba (Na5Ca)Ca6Ba(PO4)6F3. Doklady Akademii Nauk SSSR: 274: 78-83.

Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Krzątała, A., Vapnik, Ye., Kusz, J., Dulski, M., Gardocki, M., Gurbanov, A.G., Dzierżanowski, P. (2016): New minerals with modular structure derived from hatrurite from the pyrometamorphic rocks, Part III: Gazeevite, BaCa6(SiO4)2(SO4)2O, from Israel and Palestine Autonomy, South Levant and from South Ossetia, Greater Caucasus. Mineralogical Magazine: 80 (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=12719 (2016)

Internet Links for Arctite

mindat.org URL:
https://www.mindat.org/min-316.html
Please feel free to link to this page.

Localities for Arctite

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.
(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
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).
[World of Stones 95:5-6, p64]
Museum Victoria (Australia) Specimen No. M 46346
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
www.koeln.netsurf.de/~w.steffens/lovo.htm
Mineral and/or Locality  
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