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Eastonite

Collectors Summary

Cleavages vollkommen
Solubility +++ H2SO4, hinterläßt Umrisse von SiO2
Crystal System monoklin, C2

Chemism

Chem­ical formula

KMg2Al[(OH)2|Al2Si2O10]

Chem­ical com­po­si­tion

Aluminium, Magnesium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 418.8331586 u; Number of atoms in the formula: 22

Info

Empirical formula:

KMg2Al[(OH)2Al2Si2O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.48

2

9.09

1.0079470

2.0158940

Oxygen

O

45.84

12

54.55

15.9994300

191.9931600

Magnesium

Mg

11.61

2

9.09

24.3050600

48.6101200

Aluminium

Al

19.33

3

13.64

26.9815382

80.9446146

Silicon

Si

13.41

2

9.09

28.0855300

56.1710600

Potassium

K

9.34

1

4.55

39.0983100

39.0983100

Anal­y­sis wt%

SiO2 : 28.69, Al2O3 : 36.52, MgO : 19.25, K2O : 11.25, H2O : 4.30 (Ref: berechnet)

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.11-150

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.120

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

max. Birefrin­gence

0.036

Birefringence chart\! Eastonite title=Birefringence chart Eastonite

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

1.542

RI value β

1.577

RI value γ / ε

1.578

Ri mean

1.566

2V angle

Biaxial (-) small

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2

Space Group number

5

Space Group

C2

Cell param­e­ters α

90°

Cell param­e­ters γ

90°

Physical Properties

Cleav­ages

vollkommen

Insta­bil­ity

+++ H2SO4, hinterläßt Umrisse von SiO2

(Co-)Type locality

(Co-)Type locality

USA/Pennsylvania/Northampton Co./Easton/Chestnut Hill

Preface

Author (Name, Year)

Winchell, 1925

References

Canadian Mineralogist 36 (1998), 905

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

Eastonit

Spanish

Eastonita

French

Eastonite

English

Eastonite

Russian

Истонит

Alternative Name

Simplified Chinese

富镁黑云母

Simplified Chinese

镁黑云母

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

German pages

DeWikiPedia - search for: Eastonit
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English pages

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