https://www.edelsteine-neuburg.de
https://www.mineral-bosse.de
https://www.mineralbox.biz
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Montdorite

Pictures (1 Images total)

Montdorit
Views (File:
1586716715
): 259
Montdorit
schwarze Aggreagte von Montdorit in Matrix, Charlannes, La Bourboule, Puy-de-Dôme, Auvergne-Rhône-Alpes, Frankreich; BB ~ 4 mm
Copyright: Joy Desor; Contribution: openpit
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Issoire, Arrondissement/La Bourboule/Charlannes
Mineral: Montdorite
Image: 1586716715
License: Usage for Mineralienatlas project only
Montdorit

schwarze Aggreagte von Montdorit in Matrix, Charlannes, La Bourboule, Puy-de-Dôme, Auvergne-Rhône-Alpes, Frankreich; BB 4 mm
Copyright: Joy Desor
Contribution: openpit 2020-04-12
Locality: Charlannes / La Bourboule / Issoire, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich

Collectors Summary

Color grün, bräunlich grün
Crystal System monoklin, C2/m

Chemism

Chemical formula

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

Chemical composition

Eisen, Magnesium, Mangan, Silicium, Fluor, Kalium, Sauerstoff

Unit weight: 472.82089145 u; Number of atoms in the formula: 19.5

Info

Empirical formula:

KMn0.5Fe1.5Mg0.5[F2Si4O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

33.84

10

51.28

15.9994300

159.9943000
Fluorine

F

8.04

2

10.26

18.9984033

37.9968065
Magnesium

Mg

2.57

0.5

2.56

24.3050600

12.1525300
Silicon

Si

23.76

4

20.51

28.0855300

112.3421200
Potassium

K

8.27

1

5.13

39.0983100

39.0983100
Manganese

Mn

5.81

0.5

2.56

54.9380499

27.4690250
Iron

Fe

17.72

1.5

7.69

55.8452000

83.7678000

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.11-040

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.360

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Mica group  ⇒ True micas

Optical Properties

Color

grün, bräunlich grün

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.025
Birefringence chart\! Montdorite title=Birefringence chart Montdorite

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

1.580

RI value β

1.605

RI value γ / ε

1.605

Ri mean

1.597

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)

5.310

Cell parameters b (Å)

9.20

Cell parameters c (Å)

10.175

Cell parameters a/b or c/a

0.577

Cell parameters c/b

1.106

Cell parameters α

90°

Cell parameters β

99.90

Cell parameters γ

90°

Z

2

Volumne (ų)

489.667

X-Ray Powder Diffraction

9.97(40),
3.41(30),
3.339(100),
3.142(30),
2.710(30),
2.519(40),
2.003(30),
1.669(30)
XRD chart Montdorite

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

Physical Properties

Density (g/cm³)

3.15 (gemessen)

3.207 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Issoire, Arrondissement/La Bourboule/Charlannes

Preface

Author (Name, Year)

Robert & Maury, 1979

References

Canadian Mineralogist 36 (1998), 905

IMA group assignments

 
Mica group
 
 
 

 
 
True micas
 
 
 

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

 
 
 
Annite
KFe2+3(Si3Al)O10(OH,F)2
monoklin
C2/m

 
 
 
Aspidolite
NaMg3(AlSi3)O10(OH)2
monoklin
C2/m

 
 
 
Boromuscovite
KAl2(Si3B)O10(OH,F)2
monoklin
C2/m

 
 
 
Celadonite
K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2
monoklin
C2

 
 
 
Chromphyllite
K(Cr,Al)2[(OH,F)2|AlSi3O10]
monoklin
C2/c

 
 
 
Eastonite
KMg2Al[(OH)2|Al2Si2O10]
monoklin
C2

 
 
 
Ephesite
NaLiAl2(Al2Si2)O10(OH)2
monoklin
Cc

 
 
 
Ferroaluminoceladonite
K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
Ferroceladonite
K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
Fluorannite
KFe32+[(F,OH)2|AlSi3O10]
monoklin
C2/m

 
 
 
Ganterite
(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]
monoklin
C2/c

 
 
 
Hendricksite
K(Zn,Mn)3Si3AlO10(OH)2
monoklin
C2/m

 
 
 
Masutomilite
K(Li,Al,Mn2+)3(Si,Al)4O10(F,OH)2
monoklin
C2

 
 
 
Montdorite
KMn0.52+Fe1.52+Mg0.5[F2|Si4O10]
monoklin
C2/m

 
 
 
Muscovite
KAl2(Si3Al)O10(OH,F)2
monoklin
C2/c

 
 
 
Nanpingite
CsAl2(Si,Al)4O10(OH,F)2
monoklin
C2/c

 
 
 
Norrishite
KLiMn3+2Si4O12
monoklin
C2/m

 
 
 
Paragonite
NaAl2(Si3Al)O10(OH)2
monoklin
C2/c

 
 
 
Phlogopite
KMg3(Si3Al)O10(F,OH)2
monoklin
C2/m

 
 
 
Polylithionite
KLi2AlSi4O10(F,OH)2
monoklin
C2/m

 
 
 
Preiswerkite
NaMg2Al3Si2O10(OH)2
monoklin
C2/m

 
 
 
Roscoelite
K(V,Al,Mg)2AlSi3O10(OH)2
monoklin
C2/m

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

 
 
 
Siderophyllite
KFe22+Al(Al2Si2)O10(F,OH)2
monoklin
C2/m

 
 
 
Sokolovaite
CsLi2AlSi4O10F2
monoklin
 

 
 
 
Tainiolite
KLiMg2Si4O10F2
monoklin
C/2m

 
 
 
Tetraferriannite
KFe2+3(Si3Fe3+)O10(OH)2
monoklin
C2/m

 
 
 
Tetraferriphlogopite
KMg3[(F,OH)2|(Al,Fe3+)Si3O10]
monoklin
C2/m

 
 
 
Tobelite
(NH4,K)Al2(Si3Al)O10(OH)2
monoklin
C2/m

 
 
 
Trilithionite
KLi1.5Al1.5[F2|AlSi3O10]
monoklin
C2/m

 
 
 
Yangzhumingite
KMg2.5Si4O10F2
monoklin
C2/m

Refresh list

Actuality: 29. Mar 2023 - 17:25:11

Other languages

German

Montdorit

Spanish

Montdorita

English

Montdorite

French

Montdorite

CNMNC symbol

Symbol

Mdr