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Ferro-ferri-fluoro-leakeite

Pictures (1 Images total)

Fluoro-Ferroleakeit
Views (File:
1243199435
): 1944
Fluoro-Ferroleakeit
randlich umgewandelt in Aegirin; umgeben von orange Elpidit; Bildbreite: 12 mm; Fundort: Khaldzan-Buragtag-Massiv, Altai-Hochgebirge, Hovd Aimag (Khovd Aimag), Mongolei
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
Location: Mongolei/Chowd, Aimag/Altai-Hochgebirge/Khaldzan-Buragtag-Massiv
Mineral: Ferro-ferri-fluoro-leakeite
Image: 1243199435
License: Usage for Mineralienatlas project only
Fluoro-Ferroleakeit

randlich umgewandelt in Aegirin; umgeben von orange Elpidit; Bildbreite: 12 mm; Fundort: Khaldzan-Buragtag-Massiv, Altai-Hochgebirge, Hovd Aimag (Khovd Aimag), Mongolei
Copyright: Pavel M. Kartashov
Contribution: Philip Blümner 2009-05-24
Locality: Khaldzan-Buragtag-Massiv / Altai-Hochgebirge / Chowd, Aimag / Mongolei

Collectors Summary

Color blauschwarz, schwarz
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages vollkommen {110}
Fracture unregelmäßig
Crystal System monoklin, C2/m

Chemism

Chemical formula

(Na,K)Na2Li(Fe2+,Mn2+,Mg)2Fe23+[(OH,F)|Si4O11]2

Additional chem. information

A Position: Na dominant
C2+ Position: Fe dominant
C3+ Position: Fe dominant
W Position: F dominant

Chemical composition

Eisen, Lithium, Magnesium, Mangan, Natrium, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 908.148094615 u; Number of atoms in the formula: 41.5

Info

Empirical formula:

(Na0.75K0.25)Na2Li(Fe0.6Mn0.3Mg0.1)2Fe2[((OH)0.75F0.25)Si4O11]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.17

1.5

3.61

1.0079470

1.5119205
Lithium

Li

0.76

1

2.41

6.9412000

6.9412000
Oxygen

O

41.40

23.5

56.63

15.9994300

375.9866050
Fluorine

F

1.05

0.5

1.20

18.9984033

9.4992016
Sodium

Na

6.96

2.75

6.63

22.9897702

63.2218681
Magnesium

Mg

0.54

0.2

0.48

24.3050600

4.8610120
Silicon

Si

24.74

8

19.28

28.0855300

224.6842400
Potassium

K

1.08

0.25

0.60

39.0983100

9.7745775
Manganese

Mn

3.63

0.6

1.45

54.9380499

32.9628299
Iron

Fe

19.68

3.2

7.71

55.8452000

178.7046400

Analysis wt%

SiO2 : 51.12, TiO2 : 0.68, Al2O3 : 1.13, Fe2O3 : 16.73, FeO : 8.87, MnO : 4.51, MgO : 2.02, ZnO : 0.57, Li2O : 0.99, Na2O : 9.22, K2O : 1.19, F : 2.87, H2O : 0.60 (Ref: American Mineralogist 96)

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.08-116

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

Classification by Hölzel

9.DJ.730

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

Hey's Chemical Index of Minerals

09.0DJ.730

09: Borates

Dana 8th edition

66.01.03c.15

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03c: Group 4, the sodic amphiboles

IMA status

anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

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

Optical Properties

Color

blauschwarz, schwarz

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.019
Birefringence chart\! Ferro-ferri-fluoro-leakeite title=Birefringence chart Ferro-ferri-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

1.675

RI value β

1.683

RI value γ / ε

1.694

Ri mean

1.684

2V angle

Biaxial (+) 87° (gemessen) 81° (brechnet)

Orientation

Y = b, Z ^ a = 4°

Dispersion

nicht sichtbar

Absorption

X > Y > Z

Pleochroism

Stark; dunkelindigoblau zu gelngrün

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.792

Cell parameters b (Å)

17.938

Cell parameters c (Å)

5.313

Cell parameters a/b or c/a

0.546

Cell parameters c/b

0.296

Cell parameters α

90°

Cell parameters β

103.87

Cell parameters γ

90°

Z

2

Volume (ų)

906.012

X-Ray Powder Diffraction

8.43(40),
4.481(50),
3.404(60),
3.122(30),
2.985(40),
2.710(100),
2.585(40),
2.536(90)
XRD chart Ferro-ferri-fluoro-leakeite

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)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.37 (gemessen) 3.34 (berechnet)

3.329 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {110}

Fracture

unregelmäßig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

USA/New Mexico/Taos County/Questa/Canada Pinabete Pluton

Preface

Name from

nach der chemischen Zusammensetzung und der Verwandtschaft zu Leakeit (Lkt) Amphibole

Author (Name, Year)

Hawthorne & Oberti & Ungaretti & Ottolini & Grice & Czamanske, 1996

References

Mineralogical Record 27, 393-394

Mineralogical Record: 29, 169-174

American Mineralogist 81 (1996), 226

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch - Nomenclature of the amphibole supergroup, American Mineralogist 97 (2012), 2031–2048

IMA group assignments

Other languages

German

Ferro-Ferri-Fluoro-Leakeit

English

Ferro-ferri-fluoro-leakeite

Russian

Ферроферрифторликит

Japanese

弗素鉄ﾘｰｸ閃石

old name

German

Fluoro-Ferroleakeit

Spanish

Fluoro-ferroleakeita

English

Fluoro-ferroleakeite

French

Fluoroferroleakeite

Alternative Name

Fluor-ferro-leakeite

CNMNC (IMA)-Number

IMA 1993-026

CNMNC symbol

Symbol

Fffllk

IDs

GUSID (Global unique identifier short form) nJVw9njTT0KgdD9FBi47Nw
GUID (Global unique identifier) F670959C-D378-424F-A074-3F45062E3B37
Database ID 1252