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Jørgensenite

Formula:
Na
 
2
(Sr,Ba)
 
14
Na
 
2
Al
 
12
F
 
64
(OH,F)
System:MonoclinicColour:Colourless
Lustre:VitreousHardness:3½ - 4
Name:For Vilhelm Jørgensen (1844–1925).
This page provides mineralogical data about Jørgensenite.

Classification of Jørgensenite

IMA status:Approved 1995
Strunz 8th edition ID:3/B.03-48
Nickel-Strunz 10th (pending) edition ID:3.CC.20

3 : HALIDES
C : Complex halides
C : Soro-aluminofluorides
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Type Occurrence of Jørgensenite

Type Locality:Cryolite deposit, Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland

Physical Properties of Jørgensenite

Lustre:Vitreous
Colour:Colourless
Streak:White
Hardness (Mohs):3½ - 4

Crystallography of Jørgensenite

Crystal System:Monoclinic

Optical Data of Jørgensenite

Type:Biaxial (-)
RI values: nα = 1.436 nβ = 1.442 nγ = 1.442
Maximum Birefringence:δ = 0.006

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

Chemical Properties of Jørgensenite

Formula:
Na
 
2
(Sr,Ba)
 
14
Na
 
2
Al
 
12
F
 
64
(OH,F)
Essential elements:Al, F, H, Na, O, Sr
All elements listed in formula:Al, Ba, F, H, Na, O, Sr

Relationship of Jørgensenite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CC.05Gearksutite
Ca[Al(F,OH)
 
5
(H
 
2
O)]
3.CC.10Acuminite
Sr[AlF
 
4
(OH)(H
 
2
O)]
3.CC.10Tikhonenkovite
Sr[AlF
 
4
(OH)(H
 
2
O)]
3.CC.15Artroeite
Pb[AlF
 
3
(OH)
 
2
]
3.CC.20Calcjarlite
Na(Ca,Sr)
 
3
Al
 
3
(OH)
 
2
F
 
14
3.CC.20Jarlite
Na(Sr,Ca)
 
3
Al
 
3
F
 
16

Other Names for Jørgensenite

Synonyms:
IMA1995-046
Other Languages:
German:Jørgensenit
Russian:Йоргенсенит
Spanish:Jørgensenita

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 Jørgensenite

Reference List:Canadian Mineralogist (1997): 35: 175-179.

Mineralogical Record: 28: 485.

Articles/Blogs about Jørgensenite

Internet Links for Jørgensenite

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    Localities for Jørgensenite

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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.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Arsuk
        • Arsuk Firth
          • Ivittuut (Ivigtut)
    		Can. Mineral., 35, 175–179
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