Dorfmanite
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About Dorfmanite
Formula:
Na2(PO3OH) · 2H2O
Colour:
White
Hardness:
1 - 1½
Crystal System:
Orthorhombic
Name:
Named by Y.L. Kapustin, Z.V. Pudovkina, and T.E. Bykova in 1980 in honor of Moisei Davidovich Dorfman (Моисея Давыдовича Дорфмана) (2 February 1908 - 11 November 2006, Moscow), Russian mineralogist at the A.E. Fersman Mineralogical Museum, Moscow, Russia. He was an investigator of Khibiny minerals and first reported a sodium phosphate in 1963. He helped describe many minerals.
This page provides mineralogical data about Dorfmanite.
Classification of Dorfmanite
Approved
Approval year:
1979
First published:
1980
7/C.22-10
8.CJ.60
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.1.8.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
19.1.4
19 : Phosphates
1 : Phosphates of the alkali metals
19 : Phosphates
1 : Phosphates of the alkali metals
Physical Properties of Dorfmanite
Colour:
White
Hardness:
1 - 1½ on Mohs scale
Optical Data of Dorfmanite
Type:
Biaxial (+)
RI values:
nα = 1.454 nβ = 1.461 nγ = 1.471
2V:
Measured: 65° , Calculated: 82°
Max Birefringence:
δ = 0.017

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very weak
Chemical Properties of Dorfmanite
Formula:
Na2(PO3OH) · 2H2O
Elements listed:
Crystallography of Dorfmanite
Crystal System:
Orthorhombic
Cell Parameters:
a = 10.34 Å, b = 16.82 Å, c = 6.6 Å
Ratio:
a:b:c = 0.615 : 1 : 0.392
Unit Cell V:
1,147.86 ų (Calculated from Unit Cell)
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009612 | Dorfmanite | Catti M, Ferraris G, Franchini-Angela M (1977) The crystal structure of Na2HPO4*2H2O. Competition between coordination and hydrogen bonds Acta Crystallographica B33 3449-3452 | ![]() | 1977 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Dorfmanite
Synonyms of Dorfmanite
Other Language Names for Dorfmanite
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Dorfmanite associated with Ussingite | Na2AlSi3O8OH |
2 photos of Dorfmanite associated with Lithiophosphate | Li3PO4 |
1 photo of Dorfmanite associated with Apatite | Ca5(PO4)3(Cl/F/OH) |
1 photo of Dorfmanite associated with Rhodochrosite | MnCO3 |
1 photo of Dorfmanite associated with Cosalite | Pb2Bi2S5 |
Related Minerals - Nickel-Strunz Grouping
8.CJ. | Caesiumpharmacosiderite | CsFe4[(AsO4)3(OH)4] · 4H2O | Iso. 4 3m : P4 3m |
8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O | Tric. 1 : P1 |
8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O | Tric. |
8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O | Mon. m : Pm |
8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O | Orth. |
8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O | Iso. |
8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O | Iso. 2 3 : P21 3 |
8.CJ.20 | Haidingerite | CaHAsO4 · H2O | Orth. mmm (2/m 2/m 2/m) : Pbcn |
8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O | Mon. 2/m : P21/b |
8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O | Hex. |
8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O | Tric. |
8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O | Tric. 1 : P1 |
8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · H2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.45 | Tristramite | (Ca,U,Fe)(PO4,SO4) · 2H2O | Hex. |
8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O | Hex. 6 2 2 : P62 2 2 |
8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O | Mon. m : Bb |
8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O | Mon. m : Bb |
8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O | Mon. 2/m : B2/b |
8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O | Mon. m |
8.CJ.50 | Churchite-(Nd) | Nd(PO4) · 2H2O | Mon. |
8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O | Tric. |
8.CJ.65 | Sincosite | Ca(VO)2(PO4)2 · 5H2O | Tet. 4/mmm (4/m 2/m 2/m) : P42/nnm |
8.CJ.65 | Bariosincosite | Ba(VO)2(PO4)2 · 4H2O | Tet. |
8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O | Orth. mmm (2/m 2/m 2/m) : Ibca |
8.CJ.75 | Guérinite | Ca5(AsO4)2(HAsO4)2 · 9H2O | Mon. 2/m : P21/b |
8.CJ.85 | Ningyoite | CaU(PO4)2 · 1-2H2O | Orth. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.1.1 | Lithiophosphate | Li3PO4 | Orth. mm2 : Pmn21 |
19.1.2 | Olympite | Na5Li(PO4)2 | Orth. |
19.1.3 | Nahpoite | Na2(PO3OH) | Mon. 2/m : P21/m |
19.1.5 | Nalipoite | NaLi2PO4 | Orth. |
19.1.6 | Stercorite | (NH4)Na(PO3OH) · 4H2O | Tric. |
19.1.7 | Archerite | (K,NH4)(H2PO4) | Tet. 4 2m : I4 2d |
19.1.8 | Biphosphammite | NH4(H2PO4) | Tet. 4 2 2 : I41 2 2 |
19.1.9 | Phosphammite | (NH4)2(PO3OH) | Mon. 2/m : P21/b |
19.1.10 | Lithiophilite | LiMn2+PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.1.11 | Sicklerite | Li1-x(Mn3+xMn2+1-x)PO4 | Orth. |
19.1.12 | Ferrisicklerite | Li1-x(Fe3+xFe2+1-x)PO4 | Orth. |
19.1.13 | Triphylite | LiFe2+PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.1.14 | Tavorite | LiFe3+(PO4)(OH) | Tric. 1 : P1 |
19.1.15 | Marićite | NaFe2+(PO4) | Orth. mmm (2/m 2/m 2/m) : Pmna |
Other Information
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 Dorfmanite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Catti, M., Ferraris, G., Franchini-Angela, M. (1977) The crystal structure of Na2HPO4·2H2O. Competition between coordination and hydrogen bonds. Acta Crystallographica: B33: 3449-3452.
Kapustin, Y.L., Pudovkina, Z.V., Bykova, T.E. (1980) Dorfmanite, a new mineral. Zapiski Vsesoyuznogo (Vserossiyskogo) Mineralogicheskogo Obshchestva: 109(2): 211-216. (in Russian)
Fleischer, M., Chao, G.Y., Francis, C.A., Pabst, A. (1981) New mineral names. American Mineralogist: 66: 217-220.
Internet Links for Dorfmanite
mindat.org URL:
https://www.mindat.org/min-1312.html
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Localities for Dorfmanite
Locality List




All localities listed without proper references should be considered as questionable.
Austria | |
| A.Csaplovics (2014) |
Canada | |
| Grice, Joel D. (1989) Bernic Lake, Manitoba: Mining for Space-age Elements. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 64-67; 153-155.; Canadian Rockhound (2000) 4(1). |
| GRICE, J.D. (1989) Mont Saint-Hilaire, Quebec: Canada's Most Diverse Mineral Locality. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 100-108; 166-175.; HORVÁTH, L., GAULT, R.A. (1990) The mineralogy of Mont Saint-Hilaire. Mineralogical Record, 21, 281-359. |
| [Mineralogical Record Vol 23 No.4 pp 38] |
Greenland | |
| Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33 |
| 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 |
Russia (TL) | |
| Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow | |
| 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. |
| Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow | |
Richard Dale Collection, prior Mindat photos |
Alluaiv Mt, Lovozersky District, Murmansk Oblast, Russia