Natrophosphate Mineral Data (original) (raw)
General Natrophosphate Information
Chemical Formula:
Na7(PO4)2F•19(H2O)
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
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Na7(PO4)2F•19(H2O)
Environment:
Pegmatite central zone with ijolite-urtite.
IMA Status:
Approved IMA 1972
Locality:
Yukspor pegmatite, Mt. Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for the composition.
Name Pronunciation:
Natrophosphate + Pronunciation 
Synonym:
ICSD 2156
PDF 25-831
Natrophosphate Image
Images:
Natrophosphate Crystallography
Cell Dimensions:
a = 27.79, Z = 32; V = 21,461.78 Den(Calc)= 1.76
Crystal System:
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3c
X Ray Diffraction:
By Intensity(I/Io): 2.67(1), 2.42(0.9), 8.18(0.7),
Crystal Structure:
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| | Baur W H , Tillmanns E , Acta Crystallographica, Section B , 30 (1974) p.2218-2224, Salt hydrates. X. The crystal structure determinations of heptasodium fluoride, bisphosphate 19-hydrate and heptasodium fluoride bisarsenate 19-hydrate and, the computer simulation of the isomorphous vanadate salt, Note: not all H were located, Locality: synthetic | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Natrophosphate
Cleavage:
{111} Indistinct
Color:
Colorless, White.
Density:
1.71 - 1.722, Average = 1.71
Diaphaneity:
Transparent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
2.5 - Finger Nail
Luminescence:
Fluorescent, Short UV=weak orange, Long UV=weak orange.
Luster:
Vitreous - Greasy
Streak:
white
Optical Properties of Natrophosphate
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
Optical Data:
Isotropic, n=1.46-1.462.
Calculated Properties of Natrophosphate
Electron Density:
Bulk Density (Electron Density)=1.83 gm/cc
note: Specific Gravity of Natrophosphate =1.76 gm/cc.
Fermion Index:
Fermion Index = 0.000299227
Boson Index = 0.999700773
Photoelectric:
PENatrophosphate = 0.92 barns/electron
U=PENatrophosphate x rElectron Density= 1.68 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Natrophosphate is Not Radioactive
Natrophosphate Classification
Dana Class:
42.13.09.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.13)Dana Type
(42.13.09)Dana Group
42.13.09.01 Natrophosphate Na7(PO4)2F•19(H2O) F d3c 4/m 3 2/m
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
References:
NAME( Dana8) PHYS. PROP.(Dana8;Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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
17 - WWW-MINCRYST
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Print or Cut-and-Paste your Natrophosphate Specimen Label here :
Natrophosphate
Na7(PO4)2F•19(H2O)
Dana No: 42.13.09.01 Strunz No: 08.DN.05
Locality:
Notes: