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Jørgensenite

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Big Photo

Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland
© Pavel M. Kartashov

Show Jørgensenite Photos (3)



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


Compare jarlite.

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:Ivigtut 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
Class (H-M):2/m - Prismatic
Cell Parameters:a = 16.059(7) Å, b = 10.974(4) Å, c = 7.277(3) Å
β = 101.70(3)°
Ratio:a:b:c = 1.463 : 1 : 0.663
Unit Cell Volume:V 1,255.79 ų (Calculated from Unit Cell)
Z:1
Morphology:Prisms elongated along [010].
Comment:SG C2/m.
X-Ray Powder Diffraction:
d-spacingIntensity
7.844 (8)
3.643 (9)
3.453 (10)
3.193 (10)
3.112 (9)
2.989 (9)
2.173 (9)

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)
 
4
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,Na)
 
7
MgAl
 
6
F
 
32
(OH,H
 
2
O)
 
2

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:

- +
Pauly, H., F.C. Hawthorne, P.C. Burns, and G.D. Ventura (1997) Jørgensenite, Na2(Sr, Ba)14Na2Al12F64(OH, F)4, a new aluminofluoride mineral from Ivigtut, Greenland. Can. Mineral., 35, 175–179.

Hawthorne, F.C. & Burns, P.C. (1997): The crystal structure of jørgensenite. Can. Mineral., 35, 1509-1513.

Mineralogical Record: 28: 485.

Internet Links for Jørgensenite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Jørgensenite details from Handbook of Mineralogy (PDF)
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    • Localities for Jørgensenite

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