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Jorgensenite Mineral Data
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General Jorgensenite Information
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 Chemical Formula: |
Na2(Sr,Ba)14Na2Al12F64(OH,F) |
| Composition: |
Molecular Weight = 3,049.79 gm |
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Barium 15.76 % Ba 17.60 % BaO |
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Sodium 3.02 % Na 4.06 % Na2O |
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Strontium 30.17 % Sr 35.67 % SrO |
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Aluminum 10.62 % Al 20.06 % Al2O3 |
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Hydrogen 0.02 % H 0.22 % H2O |
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Oxygen 0.39 % O |
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Fluorine 40.02 % F 40.02 % F |
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- %
F -16.85 % -O=F2 |
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______ ______ |
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100.00 % 100.79 % = TOTAL OXIDE |
| Empirical Formula: |
Na414(Sr0.75)14(Ba0.25)Al12F64.25(OH)0.75 |
| Environment: |
In vugs and as fissure fillings in a cryolite deposit with other fluorides. |
| IMA Status: |
Approved IMA 1995 (Dana # Added) |
| Locality: |
Ivigtut cryolite deposit, Greenland Link to MinDat.org Location Data. |
| Name Origin: |
Named for Vilhelm J�rgensen (1844-1925), cofounder, in 1870, of the cryolite factory at Ivigtut, Greenland. |
| Name Pronunciation: |
Jorgensenite + Pronunciation  |
| Synonym: |
IMA1995-046 |
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Jorgensenite Image |
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Images:
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Jorgensenite Weberite
Comments: SEM image of polished section of aluminofluoride vein mounted in epoxy. Bladed jorgensenite (Jor), barite (Bar) and weberite (Web) with minor quartz, bøgvadite, schorl, pyrite, galena, chalcopyrite and chalcocite.
Location: Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland.
Scale: See Image.
© Pavel M. Kartashov |
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Jorgensenite Crystallography
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| Axial Ratios: |
a:b:c =1.4625:1:0.6636 |
| Cell Dimensions: |
a = 16.046, b = 10.971, c = 7.281, Z = 1; beta = 101.734° V = 1,254.97 Den(Calc)= 4.04 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.193(1), 3.453(1), 3.643(0.9), |
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Physical Properties of Jorgensenite
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| Color: |
Colorless, White. |
| Density: |
3.89 |
| Diaphaneity: |
Translucent |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Jorgensenite
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| Optical Data: |
Biaxial (-), a=1.436, b=1.442, g=1.442, bire=0.0060 |
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Calculated Properties of Jorgensenite
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| Electron Density: |
Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Jorgensenite =4.04 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEJorgensenite = 105.59 barns/electron
U=PEJorgensenite x rElectron Density= 386.04 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jorgensenite is Not Radioactive |
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Jorgensenite Classification
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| Dana Class: |
11.06.10.03 (11)Halide Complexes; Alumino-fluorides |
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(11.06)with miscellaneous formulae |
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(11.06.10)Jarlite Group |
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11.06.10.01 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m |
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11.06.10.02 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m |
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11.06.10.03 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m |
| Strunz Class: |
03.CC.20 03 - HALIDES |
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03.C - Complex Halides |
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03.CC -Soro-aluminofluorides |
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03.CC.20 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m |
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03.CC.20 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m |
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03.CC.20 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m |
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Other Jorgensenite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.82,p1261,1997) OPTIC PROP.(Am.Min.,Vol.82,p1261,1997) |
| See Also: |
Links to other databases for Jorgensenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST
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Jorgensenite
Na2(Sr,Ba)14Na2Al12F64(OH,F)
Dana No: 11.06.10.03 Strunz No: 03.CC.20
Locality:
Notes:
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