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Dorfmanite Mineral Data

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General Dorfmanite Information

Help on Chemical  Formula: Chemical Formula: Na2(PO3OH)•2(H2O)
Help on Composition: Composition: Molecular Weight = 177.99 gm
   Sodium      25.83 %  Na   34.82 % Na2O
   Phosphorus  17.40 %  P    39.87 % P2O5
   Hydrogen     2.83 %  H    25.30 % H2O
   Oxygen      53.93 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2(PO3OH)•2(H2O)
Help on Environment: Environment: Formed by alteration of lomonosovite in drill cores in alkalic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Khibina and Lovozero massifs, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Moisei Davidovich Dorfman (1908-), Russian mineralogist who first reported a sodium phosphate in 1963.
Help on Name Pronunciation: Name Pronunciation: Dorfmanite + Pronunciation Say DORFMANITE
Help on Synonym: Synonym: ICSD 1289
  PDF 10-190

Dorfmanite Image

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Comments: White cottony coatings of dorfmanite on matrix.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dorfmanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6147:1:0.3573
Help on Cell Dimensions: Cell Dimensions: a = 10.34, b = 16.82, c = 6.01, Z = 8; V = 1,045.25 Den(Calc)= 2.26
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.35(1), 3.36(1), 4.67(0.9),

Physical Properties of Dorfmanite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: White.
Help on Density: Density: 2
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Habit: Habit: Very Soluble - Material dissolves readily in water leaving no residue.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Streak: Streak: white

Optical Properties of Dorfmanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.092 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2044,KPDmeas= 0.231,KC= 0.2252
Ncalc = 1.45 - 1.51
Help on Optical Data: Optical Data: Biaxial (+), a=1.454, b=1.461, g=1.471, bire=0.0170, 2V(Calc)=82, 2V(Meas)=65. Dispersion very weak, r > v.

Calculated Properties of Dorfmanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Dorfmanite =2.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002631293
Boson Index = 0.9997368707
Help on Photoelectric: Photoelectric: PEDorfmanite = 1.29 barns/electron
U=PEDorfmanite x rElectron Density= 2.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dorfmanite is Not Radioactive

Dorfmanite Classification

Help on  Dana Class: Dana Class: (39)Hydrated Acid Phosphates, etc
  (39.01)A+ [HXO4] � x(H2O)
  (39.01.08)Dana Group Dorfmanite Na2(PO3OH)•2(H2O) Unk Ortho Catalanoite! Na2H(PO4)•8(H2O) I bca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CJ.60 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CJ -With only large cations
08.CJ.60 Dorfmanite Na2(PO3OH)•2(H2O) Unk Ortho

Other Dorfmanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Dorfmanite :
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.CJ.60





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