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Fluoro-leakeite

Collectors Summary

Color hell grünlichblau
Streak color grünlichblau
Hardness (Mohs) 6
Cleavages vollkommen {110}
Fracture splittrig
Crystal System monoklin, C2/m
Morphology prismatische Kristalle

Chemism

Chem­ical formula

NaNa2(Mg2Al2Li)Si8O22F2

Addi­tional chem. informa­tion

A Position: Na dominant
C2+ Position: Mg dominant
C3+ Position: Al dominant
W Position: F dominant

Chem­ical com­po­si­tion

Aluminium, Lithium, Magnesium, Natrium, Silicium, Fluor, Sauerstoff

Unit weight: 793.1522135 u; Number of atoms in the formula: 40

Info

Empirical formula:

NaNa2(Mg2Al2Li)Si8O22F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Lithium

Li

0.88

1

2.50

6.9412000

6.9412000

Oxygen

O

44.38

22

55.00

15.9994300

351.9874600

Fluorine

F

4.79

2

5.00

18.9984033

37.9968065

Sodium

Na

8.70

3

7.50

22.9897702

68.9693106

Magnesium

Mg

6.13

2

5.00

24.3050600

48.6101200

Aluminium

Al

6.80

2

5.00

26.9815382

53.9630764

Silicon

Si

28.33

8

20.00

28.0855300

224.6842400

Anal­y­sis wt%

SiO2 : 58.16, Al2O3 : 7.06, Fe2O3 : 6.05, FeO : 3.27, MgO : 8.61, MnO : 0.73, ZnO : 0.43, Li2O : 1.62, Na2O : 9.90, K2O : 2.43, F : 3.37, H2O : 0.50 (Ref: Mineralogical Magazine 2009)

Strunz 9th edi­tion incl. updates

9.DE.25

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
25:Amphibole: Alkali

Lapis Clas­sifica­tion

VIII/F.08-109

VIII: SILIKATE
F: Ketten- und Bandsilikate
8: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Alkali-Amphibole

Clas­sifica­tion by Hölzel

9.DJ.735

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
J: Amphiboles; Sodic Amphiboles
7: Leakeite-Group

IMA sta­tus

Anerkannt; Neue Mineralien - IMA WEB Seite - Juni 2009

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Sodium Amphiboles  ⇒ Leakeite (Lkt) amphiboles

Optical Properties

Color

hell grünlichblau

Streak color

grünlichblau

max. Birefrin­gence

0.011

Birefringence chart\! Fluoro-leakeite title=Birefringence chart Fluoro-leakeite

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

1.632

RI value β

1.638

RI value γ / ε

1.643

Ri mean

1.638

2V angle

Biaxial (-) 8°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.7043

Cell param­e­ters b (Å)

17.7341

Cell param­e­ters c (Å)

5.2833

Cell param­e­ters a/b or c/a

0.547

Cell param­e­ters c/b

0.298

Cell param­e­ters α

90°

Cell param­e­ters β

104.067

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

881.974

X-Ray Pow­der Diffrac­tion

8.342(50), 4.435(80), 3.377(80), 3.096(40), 2.687(100), 2.557(30), 2.527(60), 2.259(40)

XRD chart Fluoro-leakeite

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

Morphol­ogy

prismatische Kristalle

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6

Density (g/cm³)

2.986 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {110}

Frac­ture

splittrig

Preface

Author (Name, Year)

Roberta Oberti, 2009

References

Neue Mineralien - IMA WEB Seite - Juni 2009

Oberti R, Cámara F, Hawthorne F C, Ball N A (2009) Fluoro-aluminoleakeite, NaNa2(Mg2Al2Li)Si8O22F2, a new mineral of the amphibole group from Norra Kärr, Sweden: description and crystal structure, Mineralogical Magazine 73, 817-824

IMA group assignments

Other languages

German

Fluoro-Leakeit

English

Fluoro-leakeite

Russian

Фторликеит

old name

German

Fluoro-Aluminoleakeit

English

Fluoro-aluminoleakeite

Alternative Name

English

Fluoroaluminoleakeite

German

Fluoroleakeit

Lapis-Mineralienverzeichnis

CNMNC (IMA)-Number

IMA 2009-012

CNMNC symbol

Symbol

Fllk

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Fluoro-Leakeit
Google-Bilder-Suche - search for: Fluoro-Leakeit
Mineralienatlas.de (Forum) - search for: Fluoro-Leakeit

English pages

Mindat - search for: Fluoro-leakeite
Webmineral - search for:Fluoro-leakeite
Handbook-of-Mineralogy - search for: Fluoro-leakeite
RRUFF - Raman, XRD and other mineral data - search for: Fluoro-leakeite
RRUFF - References and PDF downloads - search for: Fluoro-leakeite
American-Mineralogist-Crystal-Structure-Database - search for: Fluoro-leakeite
Strahlen.org - search for: Fluoro-leakeite

Russian pages

Webmineral.ru - search for: Фторликеит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Fluoro-Leakeit
Crystal-Treasure.com - search for: Fluoro-Leakeit
Bosse - search for: Fluoro-Leakeit
Edelsteine Neuburg - Gundolf Fischer - search for: Fluoro-Leakeit
Geolitho marketplace, by and for collectors - search for: Fluoro-Leakeit

Locations with GPS information