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Dorfmanite

Big Photo

Kedykverpakhk Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© DV Minerals

Show Dorfmanite Photos (2)
Formula:
Na
 
2
(PO
 
3
OH)·2H
 
2
O
System:OrthorhombicColour:White
Hardness:1 - 1½
This page provides mineralogical data about Dorfmanite.

Classification of Dorfmanite

IMA status:Approved 1979
Strunz 8th edition ID:7/C.22-10
Nickel-Strunz 10th (pending) edition ID:8.CJ.60

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
Dana 8th edition ID:39.1.8.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
Hey's CIM Ref.:19.1.4

19 : Phosphates
1 : Phosphates of the alkali metals
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Type Occurrence of Dorfmanite

Co-type Localities:Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Material'naya Adit, Yukspor Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1980

Physical Properties of Dorfmanite

Colour:White
Hardness (Mohs):1 - 1½

Crystallography of Dorfmanite

Crystal System:Orthorhombic
Cell Parameters:a = 10.34Å, b = 16.82Å, c = 6.6Å
Ratio:a:b:c = 0.615 : 1 : 0.392
Unit Cell Volume:V 1,147.86 ų (Calculated from Unit Cell)

Optical Data of Dorfmanite

Type:Biaxial (+)
RI values: nα = 1.454 nβ = 1.461 nγ = 1.471
2V:Measured: 65° , Calculated: 82°
Maximum Birefringence:δ = 0.017

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:very weak

Chemical Properties of Dorfmanite

Formula:
Na
 
2
(PO
 
3
OH)·2H
 
2
O
Essential elements:H, Na, O, P
All elements listed in formula:H, Na, O, P

Relationship of Dorfmanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CJ.05Stercorite
NaNH
 
4
HPO
 
4
·4H
 
2
O
8.CJ.10Mundrabillaite
(NH
 
4
)
 
2
Ca(HPO
 
4
)
 
2
·H
 
2
O
8.CJ.10Swaknoite
(NH
 
4
)
 
2
Ca[HPO
 
4
]
 
2
 · H
 
2
O
8.CJ.15Nabaphite
NaBaPO
 
4
·9H
 
2
O
8.CJ.15Nastrophite
Na(Sr,Ba)PO
 
4
·9H
 
2
O
8.CJ.20Haidingerite
Ca[HAsO
 
4
] · H
 
2
O
8.CJ.25Vladimirite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 5H
 
2
O
8.CJ.30Ferrarisite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.35Machatschkiite
(Ca,Na)
 
6
AsO
 
4
(AsO
 
3
OH)
 
3
(PO
 
4
,SO
 
4
)·15H
 
2
O
8.CJ.40Phaunouxite
Ca
 
3
[AsO
 
4
]
 
2
 · 11H
 
2
O
8.CJ.40Rauenthalite
Ca
 
3
[AsO
 
4
]
 
2
 · 10H
 
2
O
8.CJ.45Brockite
(Ca,Th,Ce)(PO
 
4
)·H
 
2
O
8.CJ.45Grayite
(Th,Pb,Ca)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(Ce)
(Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(La)
(La,Ce)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(Nd)
(Nd,Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
)·2H
 
2
O
8.CJ.45Smirnovskite
(Th,Ca)PO
 
4
 ·nH
 
2
O
8.CJ.50Ardealite
Ca
 
2
[HPO
 
4
|SO
 
4
] · 4H
 
2
O
8.CJ.50Brushite
CaHPO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Y)
YPO
 
4
·2H
 
2
O
8.CJ.50Pharmacolite
CaHAsO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Nd)
NdPO
 
4
·2H
 
2
O
8.CJ.55Mcnearite
NaCa
 
5
[(HAsO
 
4
)
 
4
|AsO
 
4
] · 4H
 
2
O
8.CJ.65Sincosite
CaV
 
2
(PO
 
4
)
 
2
O
 
2
·5H
 
2
O
8.CJ.65Bariosincosite
Ba(V
4+
 
O)
 
2
(PO
 
4
)
 
2
·4H
 
2
O
8.CJ.70Catalanoite
Na
 
2
[HPO
 
4
] · 8H
 
2
O
8.CJ.75Guérinite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.80Ningyoite
CaU(PO
 
4
)
 
2
·1-2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.1.1Lithiophosphate
Li
 
3
[PO
 
4
]
19.1.2Olympite
Na
 
5
Li[PO
 
4
]
 
2
19.1.3Nahpoite
Na
 
2
HPO
 
4
19.1.5Nalipoite
NaLi
 
2
[PO
 
4
]
19.1.6Stercorite
NaNH
 
4
HPO
 
4
·4H
 
2
O
19.1.7Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
19.1.8Biphosphammite
(NH
 
4
,K)H
 
2
PO
 
4
19.1.9Phosphammite
(NH
 
4
)
 
2
HPO
 
4
19.1.10Lithiophilite
LiMn
2+
 
[PO
 
4
]
19.1.11Sicklerite
(LiMn
2+
 
,Fe
3+
 
)[PO
 
4
]
19.1.12Ferrisicklerite
(Fe
3+
 
,LiMn
2+
 
)[PO
 
4
]
19.1.13Triphylite
LiFe
2+
 
[PO
 
4
]
19.1.14Tavorite
LiFe
3+
 
[OH|PO
 
4
]
19.1.15Marićite
NaFe
2+
 
[PO
 
4
]

Other Names for Dorfmanite

Synonyms:
IMA1979-053
Other Languages:
German:Dorfmanit
Russian:Дорфманит
Spanish:Dorfmanita

Other Information

Health Warning: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:American Mineralogist: 66: 217-218.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 109: 211-216.

Acta Crystallographica: B33: 3449-3452.

Articles/Blogs about Dorfmanite

Internet Links for Dorfmanite

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    Localities for Dorfmanite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Manitoba
      • Lac-du-Bonnet area
        • Bernic Lake
    		Can. Rockhound. 4(1), 2000.
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    • Yukon Territory
      • Dawson Mining District
    		[Mineralogical Record Vol 23 No.4 pp 38]
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
          • Kuannersuit (Kvanefjeld) plateau
            • Kvanefjeld Uranium deposit
    		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
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Yukspor Mt
          • Lovozero Massif
    Mineral and/or Locality
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