Dorfmanite Mineral Data + 
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- 39.1.8.1 Dorfmanite Na2(PO3OH)·2(H2O) Unk Ortho
- 39.1.8.2 Catalanoite! Na2H(PO4)·8(H2O) I bca 2/m 2/m 2/m
- VII/C.22-10 Dorfmanite Na2(PO3OH)·2(H2O) Unk Ortho
General Dorfmanite Information |
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 Chemical Formula: |
Na2(PO3OH)·2(H2O) | ||
| 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 | |||
| Empirical Formula: |
Na2(PO3OH)·2(H2O) | ||
| Environment: |
Formed by alteration of lomonosovite in drill cores in alkalic pegmatites. | ||
| IMA Status: |
Approved IMA 1980 | ||
| Locality: |
Khibina and Lovozero massifs, Kola Peninsula, Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Moisei Davidovich Dorfman (1908-), Russian mineralogist who first reported a sodium phosphate in 1963. | ||
| Synonym: |
ICSD 1289 | ||
| PDF 10-190 | |||
Dorfmanite Image | |||
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Images:
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Dorfmanite Crystallography |
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| Axial Ratios: |
a:b:c =0.6147:1:0.3573 | ||
| Cell Dimensions: |
a = 10.34, b = 16.82, c = 6.01, Z = 8; V = 1,045.25 Den(Calc)= 2.26 | ||
| Crystal System: |
OrthorhombicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.35(1), 3.36(1), 4.67(0.9), | ||
Physical Properties of Dorfmanite |
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| Cleavage: |
[???] Indistinct | ||
| Color: |
White. | ||
| Density: |
2 | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Habit: |
Very Soluble - Material dissolves readily in water leaving no residue. | ||
| Hardness: |
1-1.5 - Talc or a little harder | ||
| Streak: |
white | ||
Optical Properties of Dorfmanite |
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| 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 |
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| 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 |
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| Electron Density: |
relectron=2.02 gm/cc |
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| Fermion Index |
Fermion Index = 0.00026 Boson Index = 0.99974 |
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| Photoelectric: |
PEDorfmanite = 1.29 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Dorfmanite is Not Radioactive |
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Dorfmanite Classification |
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| Dana Class: |
39.1.8.1 (39)Hydrated Acid Phosphates, etc | ||
| (39.1)A+ [HXO4] · x(H2O) | |||
| (39.1.8)Dana Group | |||
| Strunz Class: |
VII/C.22-10 VII - Phosphates, Arsenates and Vanadates | ||
| VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+ | |||
| VII/C.22 - Dorfmanite series | |||
Other Dorfmanite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| 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 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Dorfmanite using: Visit our Advertisers for Dorfmanite : Translate Dorfmanite Mineral Data : Ask about Dorfmanite here : Print or Cut-and-Paste your Dorfmanite Specimen Label here :
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