|
|
Jorgensenite Mineral Data
|
|
|
General Jorgensenite Information
|
Chemical Formula: |
Na2(Sr,Ba)14Na2Al12F64(OH,F) |
Composition: |
Molecular Weight = 3,049.79 gm |
|
Barium 15.76 % Ba 17.60 % BaO |
|
Sodium 3.02 % Na 4.06 % Na2O |
|
Strontium 30.17 % Sr 35.67 % SrO |
|
Aluminum 10.62 % Al 20.06 % Al2O3 |
|
Hydrogen 0.02 % H 0.22 % H2O |
|
Oxygen 0.39 % O |
|
Fluorine 40.02 % F 40.02 % F |
|
- %
F -16.85 % -O=F2 |
|
______ ______ |
|
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 |
|
Jorgensenite Image |
Images:
|
|
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 |
|
Jorgensenite Crystallography
|
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), |
|
Physical Properties of Jorgensenite
|
Color: |
Colorless, White. |
Density: |
3.89 |
Diaphaneity: |
Translucent |
Hardness: |
3.5-4 - Copper Penny-Fluorite |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
|
Optical Properties of Jorgensenite
|
Optical Data: |
Biaxial (-), a=1.436, b=1.442, g=1.442, bire=0.0060 |
|
Calculated Properties of Jorgensenite
|
Electron Density: |
Bulk Density (Electron Density)=3.66 gm/cc note: Specific Gravity of Jorgensenite =4.04 gm/cc. |
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. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Jorgensenite is Not Radioactive |
|
Jorgensenite Classification
|
Dana Class: |
11.06.10.03 (11)Halide Complexes; Alumino-fluorides |
|
(11.06)with miscellaneous formulae |
|
(11.06.10)Jarlite Group |
|
11.06.10.01 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m |
|
11.06.10.02 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m |
|
11.06.10.03 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m |
Strunz Class: |
03.CC.20 03 - HALIDES |
|
03.C - Complex Halides |
|
03.CC -Soro-aluminofluorides |
|
03.CC.20 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m |
|
03.CC.20 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m |
|
03.CC.20 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m |
|
Other Jorgensenite Information
|
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
Search for Jorgensenite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Jorgensenite :
Ask about Jorgensenite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Jorgensenite Specimen Label here :
Jorgensenite
Na2(Sr,Ba)14Na2Al12F64(OH,F)
Dana No: 11.06.10.03 Strunz No: 03.CC.20
Locality:
Notes:
|
|
|
|
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.