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Jarlite Mineral Data
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General Jarlite Information
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 Chemical Formula: |
Na(Sr,Na,[ ])7(Mg,[ ])Al6F32(OH,H2O)2 |
| Composition: |
Molecular Weight = 1,393.57 gm |
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Barium 0.99 % Ba 1.10 % BaO |
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Sodium 3.30 % Na 4.45 % Na2O |
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Strontium 35.84 % Sr 42.38 % SrO |
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Lithium 0.10 % Li 0.21 % Li2O |
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Calcium 0.58 % Ca 0.80 % CaO |
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Magnesium 0.87 % Mg 1.45 % MgO |
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Aluminum 12.00 % Al 22.68 % Al2O3 |
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Hydrogen 0.33 % H 2.97 % H2O |
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Oxygen 2.64 % O |
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Fluorine 43.35 % F 43.35 % F |
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- %
F -18.25 % -O=F2 |
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______ ______ |
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100.00 % 101.15 % = TOTAL OXIDE |
| Empirical Formula: |
NaSr5.7NaCa0.2Li0.2Ba0.1Mg0.5Al6.2F31.8(H2O)2.3 |
| Environment: |
In vugs in a cryolite deposit with other fluorides. |
| IMA Status: |
Valid Species (Pre-IMA) 1933 |
| Locality: |
Ivigtut cryolite deposit, Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Carl Frederik Jarl (1872-19510, Formerly President of the Danish Cryolite Company, who first noted the mineral. |
| Name Pronunciation: |
Jarlite  |
| Synonym: |
ICSD 40143 |
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PDF 5-594 |
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Jarlite Image |
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Images:
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Jarlite Crystallography
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| Axial Ratios: |
a:b:c =1.4732:1:0.6691 |
| Cell Dimensions: |
a = 15.942, b = 10.821, c = 7.241, Z = 2; beta = 101.86° V = 1,222.47 Den(Calc)= 3.79 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.98(1), 3.19(0.9), 2.15(0.7), |
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Physical Properties of Jarlite
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| Color: |
Colorless, Gray white, White. |
| Density: |
3.87 |
| Diaphaneity: |
Transparent to Translucent |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Habit: |
Spherical - Spherical, rounded aggregates. |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
4-4.5 - Between Fluorite and Apatite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Jarlite
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| Optical Data: |
Biaxial (+/-), a=1.429, b=1.433, g=1.436, bire=0.0070, 2V(Calc)=80, 2V(Meas)=90. |
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Calculated Properties of Jarlite
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| Electron Density: |
Bulk Density (Electron Density)=3.51 gm/cc
note: Specific Gravity of Jarlite =3.79 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEJarlite = 45.93 barns/electron
U=PEJarlite x rElectron Density= 161.02 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jarlite is Not Radioactive |
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Jarlite Classification
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| Dana Class: |
11.06.10.01 (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 Jarlite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Jarlite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Jarlite
Na(Sr,Na,[ ])7(Mg,[ ])Al6F32(OH,H2O)2
Dana No: 11.06.10.01 Strunz No: 03.CC.20
Locality:
Notes:
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