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Jarlite (Jarlit)

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Jarlit
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Jarlit
Bildbreite: 2 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Luigi Chiappino; Contribution: slugslayer
Location: Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)
Mineral: Jarlite
Image: 1287251654
Rating: 4.5 (votes: 2)
License: Usage for Mineralienatlas project only
Jarlit

Bildbreite: 2 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Luigi Chiappino
Contribution: slugslayer 2010-10-16
Locality: Kryolithlagerstätte (Cryolite deposit) / Ivittuut (Ivigtut) / Kommuneqarfik Sermersooq / Grönland

Collectors Summary

Color farblos, grauweiß, weiß
Streak color weiß
Hardness (Mohs) 4.25
Solubility +++ H2SO4, AlCl3, NH4Cl
Crystal System monoklin, C2/m

Chemism

Chemical formula

Na(Sr,Na)7MgAl6F32(OH,H2O)2

Empirical formula (analysis)

NaSr5.7NaCa0.2Li0.2Ba0.1Mg0.5Al6.2F31.8(H2O)2.3

Chemical composition

Aluminium, Magnesium, Natrium, Strontium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 1393.57846579 u; Number of atoms in the formula: 53.6

Info

Empirical formula:

NaSr5.7NaCa0.2Li0.2Ba0.1Mg0.5Al6.2F31.8(H2O)2.3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.33

4.6

8.58

1.0079470

4.6365562
Lithium

Li

0.10

0.2

0.37

6.9412000

1.3882400
Oxygen

O

2.64

2.3

4.29

15.9994300

36.7986890
Fluorine

F

43.35

31.8

59.33

18.9984033

604.1492234
Sodium

Na

3.30

2

3.73

22.9897702

45.9795404
Magnesium

Mg

0.87

0.5

0.93

24.3050600

12.1525300
Aluminium

Al

12.00

6.2

11.57

26.9815382

167.2855368
Calcium

Ca

0.58

0.2

0.37

40.0784000

8.0156800
Strontium

Sr

35.84

5.7

10.63

87.6210000

499.4397000
Barium

Ba

0.99

0.1

0.19

137.3277000

13.7327700

Strunz 9th edition incl. updates

3.CC.20

3: Halide (Fluoride, Chloride, Bromide, Iodide)
C: Komplexe Halogenide
C: Gruppen-Aluminofluoride (Soro-Aluminofluoride)
20:Jarlit-Gruppe

Lapis Classification

III/B.03-050

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
B: Doppelhalogenide
3: mit [BF4] 1-, [SiF6] 2- und [AlF6] 3-

Classification by Hölzel

3.DE.100

3: HALIDES
D: Complex Halides
E: Jarlite-Group

Dana 8th edition

11.06.10.01

11: Halide Complexes; Alumino-fluorides
06: Halide Complexes; Alumino-fluorides with miscellaneous formulae
10: Jarlite Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, grauweiß, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.007
Birefringence chart\! Jarlite title=Birefringence chart Jarlite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.429

RI value β

1.433

RI value γ / ε

1.436

Ri mean

1.433

2V angle

Biaxial (+/-) 82° - 90° (gemessen)

Orientation

Y = b, X ^ c = 6

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

15.942

Cell parameters b (Å)

10.821

Cell parameters c (Å)

7.421

Cell parameters a/b or c/a

1.473

Cell parameters c/b

0.686

Cell parameters α

90°

Cell parameters β

101.87

Cell parameters γ

90°

Z

2

Volumne (ų)

1252.81

X-Ray Powder Diffraction

3.63(40),
3.45(40),
3.19(90),
3.11(60),
2.98(100),
2.15(70),
1.996(40),
1.816(60)
XRD chart Jarlite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.25

VHN (Hardness Vickers)

230 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.87 (gemessen)

3.694 ( ρ calc. Mineralienatlas )

Instability

+++ H2SO4, AlCl3, NH4Cl

(Co-)Type locality

(Co-)Type locality

Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)

Preface

Author (Name, Year)

Bøgvad, 1933

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 277

Other languages

German

Jarlit

Spanish

Jarlita

French

Jarlite

English

Jarlite

Russian

Ярлит

CNMNC symbol

Symbol

Jar

Locations with GPS information