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(Sr_0.75)14(Ba_0.25)Al₁₂F_64.25(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 Jørgensen (1844-1925), cofounder, in 1870, of the cryolite factory at Ivigtut, Greenland.

Name Pronunciation:

Jorgensenite + Pronunciation

Synonym:

IMA1995-046

Jorgensenite Image

Images:

Click Here for Larger Jorgensenite Image

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, bÃ¸gvadite, 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 - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.193(1), 3.453(1), 3.643(0.9),

Crystal Structure:

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Hawthorne F C , Burns P C , The Canadian Mineralogist , 35 (1997) p.1509-1513, The crystal structure of jorgensenite

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:

PE_Jorgensenite= 105.59 barns/electron
U=PE_Jorgensenite 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

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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: