Mineralogy Database

Natrophosphate Mineral Data

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General Natrophosphate Information

Help on Chemical  Formula: Chemical Formula: Na7(PO4)2F•19(H2O)
Help on Composition: Composition: Molecular Weight = 712.16 gm
   Sodium      22.60 %  Na   30.46 % Na2O
   Phosphorus   8.70 %  P    19.93 % P2O5
   Hydrogen     5.38 %  H    48.06 % H2O
   Oxygen      60.66 %  O
   Fluorine     2.67 %  F     2.67 % F
                 -   %   F    -1.12 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na7(PO4)2F•19(H2O)
Help on Environment: Environment: Pegmatite central zone with ijolite-urtite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: Yukspor pegmatite, Mt. Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Natrophosphate + Pronunciation Say NATROPHOSPHATE
Help on Synonym: Synonym: ICSD 2156
  PDF 25-831

Natrophosphate Image

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Comments: Specimen of natrophosphate sealed into a plastic box.
Location: Koashva Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 2x1.5x1 cm.
© Sergey Vasiliev / Systematic Mineralogy

Natrophosphate Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 27.79, Z = 32; V = 21,461.78 Den(Calc)= 1.76
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.67(1), 2.42(0.9), 8.18(0.7),

Physical Properties of Natrophosphate

Help on Cleavage: Cleavage: {111} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.71 - 1.722, Average = 1.71
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak orange, Long UV=weak orange.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Natrophosphate

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2619,KPDmeas= 0.2686,KC= 0.259
Ncalc = 1.44 - 1.46
Help on Optical Data: Optical Data: Isotropic, n=1.46-1.462.

Calculated Properties of Natrophosphate

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.83 gm/cc
note: Specific Gravity of Natrophosphate =1.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000299227
Boson Index = 0.999700773
Help on Photoelectric: Photoelectric: PENatrophosphate = 0.92 barns/electron
U=PENatrophosphate x rElectron Density= 1.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Natrophosphate is Not Radioactive

Natrophosphate Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.13)Dana Type
  (42.13.09)Dana Group Natrophosphate Na7(PO4)2F•19(H2O) F d3c 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 08.DN.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DN -With only large cations
08.DN.05 Natrophosphate Na7(PO4)2F•19(H2O) F d3c 4/m 3 2/m

Other Natrophosphate Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8;Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Natrophosphate :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 08.DN.05





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