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Ganterite

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Ganterit xx (Glimmerartige Täfelchen)
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Ganterit xx (Glimmerartige Täfelchen)

Wasenalp Gantertal Simplongebiet Wallis Schweiz. BB=15mm.

Collection: pilzpirat
Copyright: pilzpirat
Contribution: pilzpirat 2012-03-11
Locality: Wasenalp / Gantertal / Simplonpassgebiet / Brig, Bezirk / Wallis, Kanton / Schweiz

Collectors Summary

Color hellgrau, silber
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 4 - 4.5
Cleavages vollkommen {001}
Fracture lamellar
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]

Chem­ical com­po­si­tion

Aluminium, Barium, Magnesium, Natrium, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 424.261382635 u; Number of atoms in the formula: 19.5

Info

Empirical formula:

(Ba0.6Na0.3K0.1)(Al0.75Mg0.25)2[((OH)0.75F0.25)2(Al0.75Si0.25)Si2O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.36

1.5

7.69

1.0079470

1.5119205

Oxygen

O

43.37

11.5

58.97

15.9994300

183.9934450

Fluorine

F

2.24

0.5

2.56

18.9984033

9.4992016

Sodium

Na

1.63

0.3

1.54

22.9897702

6.8969311

Magnesium

Mg

2.86

0.5

2.56

24.3050600

12.1525300

Aluminium

Al

14.31

2.25

11.54

26.9815382

60.7084610

Silicon

Si

14.89

2.25

11.54

28.0855300

63.1924425

Potassium

K

0.92

0.1

0.51

39.0983100

3.9098310

Barium

Ba

19.42

0.6

3.08

137.3277000

82.3966200

Anal­y­sis wt%

SiO2 : 37.47, TiO2 : 0.73, Al2O3 : 36.50, FeO : 0.69, MgO : 0.86, BaO : 15.54, Na2O : 1.91, K2O : 3.02, H2O : 3.90 (Ref: Canadian Mineralogist 2003)

Strunz 9th edi­tion incl. updates

9.EC.15

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

Lapis Clas­sifica­tion

VIII/H.10-095

VIII: SILIKATE
H: Schichtsilikate
10: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Seladonit/Muskovit-Reihe (Phengite)

Clas­sifica­tion by Hölzel

9.EC.270

9: SILICATES
E: Phyllosilicates
C: Micas-Group

IMA sta­tus

anerkannt 2000

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Mica group  ⇒ True micas

Optical Properties

Color

hellgrau, silber

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.022

Birefringence chart\! Ganterite title=Birefringence chart Ganterite

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

1.600

RI value β

1.619

RI value γ / ε

1.622

Ri mean

1.614

2V angle

Biaxial (-) 43°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

5.212

Cell param­e­ters b (Å)

9.046

Cell param­e­ters c (Å)

19.978

Cell param­e­ters a/b or c/a

0.576

Cell param­e­ters c/b

2.208

Cell param­e­ters α

90°

Cell param­e­ters β

95.80

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

937.096

X-Ray Pow­der Diffrac­tion

4.481(70),
3.887(80),
3.737(80),
3.495(70),
3.199(70),
2.602(90),
2.571(100),
1.5054(90)

XRD chart Ganterite

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4 - 4.5

VHN (Hard­ness Vick­ers)

260 (100g)

Density (g/cm³)

3.11 (berechnet)

3.007 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Frac­ture

lamellar

Tenac­ity

flexibel

Preface

Name from

Typlokalität

Author (Name, Year)

Graeser & Hetherington & Gieré, 2003

References

Graeser S., Hetherington C.J., Gieré R. - Ganterite, a new barium-dominant analogue of muscovite from the Berisal Complex, Simplon Region, Switzerland - Canadian Mineralogist 41 (2003), 1271-1280.

Hetherington C.J., R. Giere and S. Graeser - Composition of barium-rich white micas from the Berisal Complex, Smon Regon, Switzerland - Canadian Mineralogist 41 (2003), 1281-1291.

American Mineralogist 89 (2004), 1827.

Ma, Chi & George R. Rossman - Ganterite, the barium mica Ba0.5K0.5Al2(Al1.5Si2.5)O10(OH)2, from Oreana, Nevada. American Mineralogist - American Mineralogist 91 (2006), 702-705.

IMA group assignments

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

'Sericite' (Var.v. Muscovite)

9.EC.15

Ganterite

(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]

monoklin : 2/m : C2/c

9.EC.15

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.15

Tobelite

(NH4,K)Al2(Si3Al)O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

'Glauconite'

(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

Montdorite

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

monoklin : 2/m : C2/m

9.EC.15

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.15

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

9.EC.15

Celadonite

K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2

monoklin : 2 : C2

9.EC.15

Chernykhite

BaV2(Si2Al2)O10(OH)2

monoklin : 2/m : C2/c

9.EC.15

Roscoelite

K(V,Al,Mg)2AlSi3O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

Tainiolite

KLiMg2Si4O10F2

monoklin : 2/m : C/2m

9.EC.15

Voloshinite

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

monoklin : C2/c

9.EC.15

Cossaite

(Mg0.5,◻)Al6(SO4)6(HSO4)F6·36H2O

trigonal : 3 : R3

9.EC.15

'Muscovite-1M' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.15

'Muscovite-2A' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

triklin : 1 : C1

9.EC.15

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.15

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

9.EC.15

'Muscovite-3T' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

trigonal : 32 : P3112

9.EC.15

'Muscovite-2M2' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m

9.EC.15

Chromceladonite

KMgCr[(OH)2|Si4O10]

monoklin : 2 : C2

9.EC.15

Ferroceladonite

K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

9.EC.15

Aluminoceladonite

K(Mg,Fe2+)Al[(OH)2|Si4O10]

9.EC.15

Manganiceladonite

KMgMn3+Si4O10(OH)2

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

9.EC.15

'Zweiaxiger glimmer'

KAl2(Si,Al)4O10(OH)2

9.EC.15

Ferroaluminoceladonite

K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

9.EC.15

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

Aluminoceladonite

K(Mg,Fe2+)Al[(OH)2|Si4O10]

VIII/H.10-010

Ferroaluminoceladonite

K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.10-020

Celadonite

K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2

monoklin : 2 : C2

VIII/H.10-030

Chromceladonite

KMgCr[(OH)2|Si4O10]

monoklin : 2 : C2

VIII/H.10-035

Ferroceladonite

K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.10-040

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

VIII/H.10-050

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

VIII/H.10-060

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

VIII/H.10-070

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

VIII/H.10-080

Roscoelite

K(V,Al,Mg)2AlSi3O10(OH)2

monoklin : 2/m : C2/m

VIII/H.10-090

Ganterite

(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]

monoklin : 2/m : C2/c

VIII/H.10-095

Tobelite

(NH4,K)Al2(Si3Al)O10(OH)2

monoklin : 2/m : C2/m

VIII/H.10-100

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

VIII/H.10-110

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

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

9.EC.200

Luanshiweiite-2M1

KLiAl1.5(Si3.5Al0.5)O10(OH)2

monoklin : 2/m : C2/c

9.EC.205

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.240

'Fuchsite' (Var.v. Muscovite)

K(Al,Cr)3Si3O10(OH)2

9.EC.241

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

9.EC.242

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.245

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.250

Voloshinite

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

monoklin : C2/c

9.EC.255

Chernykhite

BaV2(Si2Al2)O10(OH)2

monoklin : 2/m : C2/c

9.EC.260

Ganterite

(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]

monoklin : 2/m : C2/c

9.EC.270

Other languages

German

Ganterit

English

Ganterite

Russian

Гантерит

Traditional Chinese

鋇雲母

Simplified Chinese

钡云母

IMA Number

IMA 2000-033

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

German pages

DeWikiPedia - search for: Ganterit
Google-Bilder-Suche - search for: Ganterit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Ganterit

English pages

Mindat - search for: Ganterite
Webmineral - search for:Ganterite
Handbook-of-Mineralogy - search for: Ganterite
RRUFF - Raman, XRD and other mineral data - search for: Ganterite
RRUFF - References and PDF downloads - search for: Ganterite
American-Mineralogist-Crystal-Structure-Database - search for: Ganterite
Athena - search for: Ganterite

Russian pages

Webmineral.ru - search for: Гантерит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Ganterit
Crystal-Treasure.com - search for: Ganterit
Bosse - search for: Ganterit

Locations with GPS information