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Fluorannite

Additional Functions

Collectors Summary

Color eisenschwarz
Streak color grau
Hardness (Mohs) 3.00 - 3.50
Cleavages vollkommen {001}
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

KFe32+[(F,OH)2|AlSi3O10]

Chem­ical com­po­si­tion

Aluminium, Eisen, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 514.867631575 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

KFe3[(F0.75(OH)0.25)2AlSi3O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.10

0.5

2.44

1.0079470

0.5039735

Oxygen

O

32.63

10.5

51.22

15.9994300

167.9940150

Fluorine

F

5.53

1.5

7.32

18.9984033

28.4976049

Aluminium

Al

5.24

1

4.88

26.9815382

26.9815382

Silicon

Si

16.36

3

14.63

28.0855300

84.2565900

Potassium

K

7.59

1

4.88

39.0983100

39.0983100

Iron

Fe

32.54

3

14.63

55.8452000

167.5356000

Anal­y­sis wt%

SiO2 : 34.12, TiO2 : 1.29, Al2O3 : 13.89, Fe2O3 : 7.86, FeO : 26.19, MgO : 1.49, MnO : 0.68, Li2O : 0.47, BaO : 0.44, K2O : 8.73, Rb2O : 0.42, F : 3.91, H2O : 0.91 (Ref: Acta Petrol.Min.2000)

Strunz 9th edi­tion incl. updates

9.EC.20

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
20:Phlogopit-Gruppe

Lapis Clas­sifica­tion

VIII/H.11-105

VIII: SILIKATE
H: Schichtsilikate
11: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Lithionit/Biotit-Reihe

Clas­sifica­tion by Hölzel

9.ED.145

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Mica group  ⇒ True micas

Optical Properties

Color

eisenschwarz

Streak color

grau

max. Birefrin­gence

0.052

Birefringence chart\! Fluorannite title=Birefringence chart Fluorannite

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

1.596

RI value β

1.648

RI value γ / ε

1.648

Ri mean

1.631

2V angle

Biaxial (-) 0°~

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

5.369

Cell param­e­ters b (Å)

9.289

Cell param­e­ters c (Å)

10.153

Cell param­e­ters a/b or c/a

0.578

Cell param­e­ters c/b

1.093

Cell param­e­ters α

90°

Cell param­e­ters β

100.48

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

497.91

X-Ray Pow­der Diffrac­tion

10.09(100),
5.02(10),
3.336(60),
3.160(10),
2.933(10),
2.649(10),
2.507(10),
2.004(10)

XRD chart Fluorannite

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

3.00 - 3.50

VHN (Hard­ness Vick­ers)

109 (g nicht angegeben)

Density (g/cm³)

3.17 (gemessen)

3.434 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Tenac­ity

schneidbar

Preface

Author (Name, Year)

Shen & Lu & Xu, 2000

References

Acta Petrologica et Mineralogica (in Chinese); = Yanshi Kuangwuxue Zashi 19 (2000), 356

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Annite

KFe2+3(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.20

'Biotite'

K(Mg,Fe2+)3(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.20

Garmite

CsLiMg2(Si4O10)F2

monoklin : m, 2/m : C2, Cm

9.EC.20

'Ephesite'

NaLiAl2(Al2Si2)O10(OH)2

monoklin : m : Cc

9.EC.20

Meifuite

KFe6(Si7Al)O19(OH)4Cl2

triklin : 1 : P1

9.EC.20

Orlovite

KLi2TiSi4O11F

monoklin : 2 : C2

9.EC.20

Wonesite

(Na,K,☐)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4

triklin : 1 : C1

9.EC.20

Eastonite

KMg2Al[(OH)2|Al2Si2O10]

monoklin : 2 : C2

9.EC.20

Suhailite

(NH4)(Fe2+)3(Si3Al)O10(OH)2

monoklin : C2/m ?

9.EC.20

Norrishite

KLiMn3+2Si4O12

monoklin : 2/m : C2/m

9.EC.20

Phlogopite

KMg3(Si3Al)O10(F,OH)2

monoklin : 2/m : C2/m

9.EC.20

Aspidolite-1M

NaMg3(AlSi3)O10(OH)2

monoklin : 2/m : C2/m

9.EC.20

Balestraite

KLi2V5+Si4O12

monoklin : 2 : C2

9.EC.20

Fluorannite

KFe32+[(F,OH)2|AlSi3O10]

monoklin : 2/m : C2/m

9.EC.20

Gorbunovite

CsLi2(Ti,Fe)Si4O10(F,OH,O)2

monoklin : 2/m, 2, m : C2/m, C2, Cm

9.EC.20

Sokolovaite

CsLi2AlSi4O10F2

9.EC.20

'Zinnwaldite'

KLiFe2+Al(AlSi3)O10(F,OH)2

monoklin : 2 : C2

9.EC.20

Hendricksite

K(Zn,Mn)3Si3AlO10(OH)2

monoklin : 2/m : C2/m

9.EC.20

Yangzhumingite

KMg2.5Si4O10F2

monoklin : 2/m : C2/m

9.EC.20

Fluorotetraferriphlogopite

KMg3Fe3+Si3O10F2

monoklin : 2/m : C2/m

9.EC.20

Preiswerkite

NaMg2Al3Si2O10(OH)2

monoklin : 2/m : C2/m

9.EC.20

'Shirozulite'

K(Mn2+,Mg)3[(OH)2|AlSi3O10]

9.EC.20

Kreiterite

CsLi2Fe3+Si4O10F2

monoklin : 2/m, m, 2 : C2/m, C2, Cm

9.EC.20

Masutomilite

K(Li,Al,Mn2+)3(Si,Al)4O10(F,OH)2

monoklin : 2 : C2

9.EC.20

Oxyphlogopite

K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2

monoklin : 2/m : C2/m

9.EC.20

Shirokshinite

KNaMg2[F2|Si4O10]

monoklin : 2/m : C2/m

9.EC.20

Trilithionite

KLi1.5Al1.5[F2|AlSi3O10]

monoklin : 2/m : C2/m

9.EC.20

Polylithionite

KLi2AlSi4O10(F,OH)2

monoklin : 2/m : C2/m

9.EC.20

Siderophyllite

KFe22+Al(Al2Si2)O10(F,OH)2

monoklin : 2 : C2/m

9.EC.20

'Spodiophyllite'

(Na,K)4(Mg,Fe2+)3(Fe3+,Al)2(Si8O24)

9.EC.20

'Fluorphlogopite'

K(Mg,Fe2+)3(Si3Al)O10(F,OH)2

9.EC.20

Fluorophlogopite

KMg3(AlSi3)O10F2

monoklin : 2/m : C2/m

9.EC.20

'Tetraferriannite'

KFe2+3(Si3Fe3+)O10(OH)2

monoklin : 2/m : C2/m

9.EC.20

Tetraferriphlogopite

KMg3[(F,OH)2|(Al,Fe3+)Si3O10]

monoklin : 2/m : C2/m

9.EC.20

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Polylithionite

KLi2AlSi4O10(F,OH)2

monoklin : 2/m : C2/m

VIII/H.11-010

Orlovite

KLi2TiSi4O11F

monoklin : 2 : C2

VIII/H.11-012

Sokolovaite

CsLi2AlSi4O10F2

VIII/H.11-015

Yangzhumingite

KMg2.5Si4O10F2

monoklin : 2/m : C2/m

VIII/H.11-018

Tainiolite

KLiMg2Si4O10F2

monoklin : 2/m : C/2m

VIII/H.11-020

Norrishite

KLiMn3+2Si4O12

monoklin : 2/m : C2/m

VIII/H.11-030

Shirokshinite

KNaMg2[F2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.11-035

Montdorite

KMn0.52+Fe1.52+Mg0.5[F2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.11-040

Trilithionite

KLi1.5Al1.5[F2|AlSi3O10]

monoklin : 2/m : C2/m

VIII/H.11-050

Voloshinite

Rb(LiAl1.50.5)(Al0.5Si3.5)O10F2

monoklin : C2/c

VIII/H.11-055

Masutomilite

K(Li,Al,Mn2+)3(Si,Al)4O10(F,OH)2

monoklin : 2 : C2

VIII/H.11-060

Aspidolite-1M

NaMg3(AlSi3)O10(OH)2

monoklin : 2/m : C2/m

VIII/H.11-070

Oxyphlogopite

K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2

monoklin : 2/m : C2/m

VIII/H.11-073

'Fluorphlogopite'

K(Mg,Fe2+)3(Si3Al)O10(F,OH)2

VIII/H.11-075

Phlogopite

KMg3(Si3Al)O10(F,OH)2

monoklin : 2/m : C2/m

VIII/H.11-080

Fluorotetraferriphlogopite

KMg3Fe3+Si3O10F2

monoklin : 2/m : C2/m

VIII/H.11-088

Tetraferriphlogopite

KMg3[(F,OH)2|(Al,Fe3+)Si3O10]

monoklin : 2/m : C2/m

VIII/H.11-090

Hendricksite

K(Zn,Mn)3Si3AlO10(OH)2

monoklin : 2/m : C2/m

VIII/H.11-100

'Shirozulite'

K(Mn2+,Mg)3[(OH)2|AlSi3O10]

VIII/H.11-102

Fluorannite

KFe32+[(F,OH)2|AlSi3O10]

monoklin : 2/m : C2/m

VIII/H.11-105

Annite

KFe2+3(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

VIII/H.11-110

'Tetraferriannite'

KFe2+3(Si3Fe3+)O10(OH)2

monoklin : 2/m : C2/m

VIII/H.11-120

Suhailite

(NH4)(Fe2+)3(Si3Al)O10(OH)2

monoklin : C2/m ?

VIII/H.11-125

'Ephesite'

NaLiAl2(Al2Si2)O10(OH)2

monoklin : m : Cc

VIII/H.11-130

Preiswerkite

NaMg2Al3Si2O10(OH)2

monoklin : 2/m : C2/m

VIII/H.11-140

Eastonite

KMg2Al[(OH)2|Al2Si2O10]

monoklin : 2 : C2

VIII/H.11-150

Siderophyllite

KFe22+Al(Al2Si2)O10(F,OH)2

monoklin : 2 : C2/m

VIII/H.11-160

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Phlogopite

KMg3(Si3Al)O10(F,OH)2

monoklin : 2/m : C2/m

9.ED.100

Fluorophlogopite

KMg3(AlSi3)O10F2

monoklin : 2/m : C2/m

9.ED.102

Tetraferriphlogopite

KMg3[(F,OH)2|(Al,Fe3+)Si3O10]

monoklin : 2/m : C2/m

9.ED.106

Fluorotetraferriphlogopite

KMg3Fe3+Si3O10F2

monoklin : 2/m : C2/m

9.ED.107

Aspidolite-1M

NaMg3(AlSi3)O10(OH)2

monoklin : 2/m : C2/m

9.ED.110

'Aspidolite-1A' (Pol.v. Aspidolite-1M)

NaMg3(AlSi3)O10(OH)2

9.ED.111

Eastonite

KMg2Al[(OH)2|Al2Si2O10]

monoklin : 2 : C2

9.ED.120

Oxyphlogopite

K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2

monoklin : 2/m : C2/m

9.ED.130

Annite

KFe2+3(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

9.ED.140

Suhailite

(NH4)(Fe2+)3(Si3Al)O10(OH)2

monoklin : C2/m ?

9.ED.142

Fluorannite

KFe32+[(F,OH)2|AlSi3O10]

monoklin : 2/m : C2/m

9.ED.145

'Tetraferriannite'

KFe2+3(Si3Fe3+)O10(OH)2

monoklin : 2/m : C2/m

9.ED.150

Hendricksite

K(Zn,Mn)3Si3AlO10(OH)2

monoklin : 2/m : C2/m

9.ED.170

'Shirozulite'

K(Mn2+,Mg)3[(OH)2|AlSi3O10]

9.ED.175

Other languages

German

Fluorannit

Spanish

Fluorannita

English

Fluorannite

French

Fluorannite

Russian

Фтораннит

Simplified Chinese

氟铁云母

Japanese

フローランナイト

IMA Number

IMA 1999-048

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

German pages

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