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Na7(PO4)2F · 19H2O
Crystal System:
A rare sodium phosphate hydrate mineral.
Partially decomposes to a white powder on exposure to air, dissolves in H2O.

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Classification of NatrophosphateHide


D : Phosphates, etc. with additional anions, with H2O
N : With only large cations

13 : Miscellaneous

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

Physical Properties of NatrophosphateHide

2½ on Mohs scale

Optical Data of NatrophosphateHide


Chemical Properties of NatrophosphateHide

Na7(PO4)2F · 19H2O

Crystallography of NatrophosphateHide

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Cell Parameters:
a = 27.79 Å
Unit Cell V:
21,461.78 ų (Calculated from Unit Cell)
Rare as octahedra, dodecahedra, or tetrahedra, typically rounded and up to 1 cm in size; also in monomineralic aggregates and veinlets.
Range observed: a = 27.79–27.93 A.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
8.18 (7)
4.93 (5)
4.06 (5)
3.05 (6)
2.90 (5)
2.67 (10)
2.42 (9)

Type Occurrence of NatrophosphateHide

Synonyms of NatrophosphateHide

Other Language Names for NatrophosphateHide

Related Minerals - Nickel-Strunz GroupingHide

8.DN.10IsoclasiteCa2(PO4)(OH) · 2H2OMon.
8.DN.15LermontoviteU(PO4)(OH) · H2OOrth. mmm (2/m 2/m 2/m) : Ccca
8.DN.15UrphoiteU4+6(PO4)7(OH)3 · 4H2OMon.
8.DN.20VyacheslaviteU(PO4)(OH) · nH2OOrth.

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
22.1.5NacaphiteNa2Ca(PO4)FMon. 2/m : P21/b
22.1.6ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m
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
22.1.14FluelliteAl2(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
22.1.18FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
22.1.20VäyryneniteMn2+Be(PO4)(OH,F)Mon. 2/m : P21/b
22.1.22Wagnerite(Mg,Fe2+)2(PO4)FMon. 2/m : P21/b
22.1.23Triplite(Mn2+,Fe2+)2(PO4)(F,OH)Mon. 2/m
22.1.25Zwieselite(Fe2+,Mn2+)2(PO4)FMon. 2/m : P21/b
22.1.26McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2OTric.
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

Partially decomposes to a white powder on exposure to air, dissolves in H2O.
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 NatrophosphateHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
KAPUSTIN, Y.L., BYKOVA, A.V., and BUKIN, V.I. (1972) Natrophosphate, a new mineral. International Geological Review, 14, 984-989. Abstract: American Mineralogist (1973): 58: 139.
GENKINA, E.A., and KHOMYAKOV, A.P. (1992) Refinement of the structure of natural natrophosphate. Soviet Physics, Crystallography, 37, 844 845.
HORVÁTH, L., and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284 359.
PETERSEN, O.V., FOCKENBERG, T., TOFT, P.C., and RATTAY, M. (1997) Natrophosphate from the Aris phonolites, Windhoek, Namibia. Neues Jahrbuch für Mineralogie, Monathefte, 1997, 511-517.
PETERSEN, O., KHOMYAKOV, A., and SØRENSEN, H. (2001): Natrophosphate from the Ilimaussaq alkaline complex, South Greenland, Geology of Greenland Survey Bulletin, 190, 139-141.
American Mineralogist (1981): 66: 879, 1281.

Internet Links for NatrophosphateHide

Localities for NatrophosphateHide

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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
        • Kuannersuit Plateau (Kvanefjeld)
          • Kvanefjeld Uranium deposit
Petersen, O., Khomyakov, A., Soerensen, H. (2001): Natrophosphate from the Ilimaussaq alkaline complex South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 139-141
  • Khomas Region
    • Windhoek District
      • Aris
Petersen, O.V., Fockenberg, T., Toft, P.C. & Rattay, M. (1997): Natrophosphate from the Aris phonolites, Windhoek, Namibia. Neues Jahrbuch für Mineralogie, Monatshefte 1997, 511-517; []
  • 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).
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; 33 IGC excursion No 47, July 22 – August 2, 2008 Stop 2-2; Kapustin, Y. L., Pudovkina, Z. V., Bykova, A. V., & Lyubomilova, G. V. (1975). Koashvite, a new mineral. International Geology Review, 17(6), 654-660.
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; Kapustin, Y. L., Pudovkina, Z. V., & Bykova, T. Y. (1982). Dorfmanite, a new mineral. International Geology Review, 24(1), 111-115.
      • Lovozero Massif
Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
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