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Illite

Pictures (17 Images total)

Illit/Hydromuskovit
Views (Image: 1232908938): 11527
Illit/Hydromuskovit

Kleine gelbe radialblättrige Illit/Hydromuskovit-Aggregate auf Siderit, Bildbreite ca 1cm; Grube Apollo, Raubach, RLP, Deutschland

Copyright: Erik
Contribution: Erik 2009-01-25
Locality: Grube Apollo / Raubach / Puderbach / Neuwied, Kreis / Rheinland-Pfalz / Deutschland
Illit mit kleine Quarz xx
Views (Image: 1390065534): 2292
Illit mit kleine Quarz xx (SNr: 687)

Mineralien: Illit (grün-blau) mit kleinen Quarzkristallen; Fundort: Kürn, Regensburg, Oberpfalz, Bayern, Deutschland; Bestimmung: optisch Bestimmt WF; Bildbreite: 2,4 mm

Collection: Florian
Copyright: Florian
Contribution: Florian 2014-01-18
Locality: Steinbruch Steinrinnen / Bernhardswald / Kürn / Regensburg, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Illit
Views (Image: 1204662478): 13628
Illit

FO: Steinbruch Petersberg (4.Sohle),Halle,Sachsen-Anhalt,D,Fund 04/2007 - Bildbreite: 2,2mm

Collection: franksch
Copyright: franksch
Contribution: franksch 2008-03-04
Locality: Quarzporphyrwerk / Petersberg / Saalekreis / Sachsen-Anhalt / Deutschland
Illit
Views (Image: 1344002994): 7313
Illit (SNr: A000045)

FO: Piesberg bei Osnabrück; Illit als derbe, cremeweiße Schicht auf fossilen Pflanzenresten; BB = 10 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Manfred Früchtl
Contribution: Münchener Micromounter 2012-08-03
Locality: Piesberg / Wallenhorst / Osnabrück, Landkreis / Niedersachsen / Deutschland
Illit, Anatas
Views (Image: 1204662395): 10296
Illit, Anatas

FO: Steinbruch Petersberg (4.Sohle), Halle, Sachsen-Anhalt, D, Fund 04/2007 - Bildbreite: 4,0 mm

Collection: franksch
Copyright: franksch
Contribution: franksch 2008-03-04
Locality: Quarzporphyrwerk / Petersberg / Saalekreis / Sachsen-Anhalt / Deutschland
Illit mit Albit
Views (Image: 1247376847): 11612
Illit mit Albit

Bildbreite: 8 mm; Fundort: Petersberg, Halle, Sachsen-Anhalt, Deutschland

Copyright: Joachim Esche
Contribution: slugslayer 2009-07-12
Locality: Petersberg / Saalekreis / Sachsen-Anhalt / Deutschland

Collectors Summary

Color weiß, grünlich, grau, gelb
Streak color weiß
Hardness (Mohs) 1.00 - 2.00
Cleavages vollkommen
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

(K,H3O)Al2(Si3Al)O10(H2O,OH)2

Chem­ical com­po­si­tion

Aluminium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 394.80172935 u; Number of atoms in the formula: 23.25

Info

Empirical formula:

(K0.75(H3O)0.25)Al2(Si3Al)O10((H2O)0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.09

4.25

18.28

1.0079470

4.2837748

Oxygen

O

49.64

12.25

52.69

15.9994300

195.9930175

Aluminium

Al

20.50

3

12.90

26.9815382

80.9446146

Silicon

Si

21.34

3

12.90

28.0855300

84.2565900

Potassium

K

7.43

0.75

3.23

39.0983100

29.3237325

Strunz 9th edi­tion incl. updates

9.EC.25

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

Lapis Clas­sifica­tion

VIII/H.13-030

VIII: SILIKATE
H: Schichtsilikate
13: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Alkali-defizitäre Glimmer (Anhang)

IMA sta­tus

lt. Glimmer Sub-Komitee wird der Name für eine Serie von dioktahedralen Zwischenlager armen Glimmer der genannten Zusammensetzung verwendet.

Min­eral sta­tus

Varietät

Var­i­ety / poly­type of

Muscovite

IMA Classification

IMA Clas­sifica­tion

Mica group  ⇒ Micas with lack of interlayers (IDM)

Optical Properties

Color

weiß, grünlich, grau, gelb

Streak color

weiß

max. Birefrin­gence

0.039

Birefringence chart\! Illite title=Birefringence chart Illite

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

1.579

RI value β

1.602

RI value γ / ε

1.618

Ri mean

1.600

2V angle

Biaxial (-) 37°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

5.19

Cell param­e­ters b (Å)

9.00

Cell param­e­ters c (Å)

20.16

Cell param­e­ters a/b or c/a

0.577

Cell param­e­ters c/b

2.240

Cell param­e­ters α

90°

Cell param­e­ters β

95.30

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

937.648

X-Ray Pow­der Diffrac­tion

10.0(90),
5.02(50),
4.48(20),
4.44(10),
3.34(100),
3.20(10),
2.99(20),
2.005(50)

XRD chart Illite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

1.00 - 2.00

Density (g/cm³)

2.79 (gemessen)

2.797 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen

(Co-)Type locality

(Co-)Type locality

USA/Illinois/Calhoun Co./Gilead/Maquoketa Shale

Preface

Author (Name, Year)

Grim & Bray & Bradley, 1937

References

  • Reviews in Mineralogy 13 (1984), 495.
  • Meunier, A., Velde, B. D. (2004): Illite. Springer; Berlin. 248 S.

IMA group assignments

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

'Illite' (Var.v. Muscovite)

(K,H3O)Al2(Si3Al)O10(H2O,OH)2

monoklin : 2/m : C2/c

9.EC.25

'Brammallite'

(Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,H2O]

monoklin : 2/m : C2/c

9.EC.25

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

Wonesite

(Na,K,☐)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4

triklin : 1 : C1

VIII/H.13-010

'Brammallite'

(Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,H2O]

monoklin : 2/m : C2/c

VIII/H.13-020

'Illite' (Var.v. Muscovite)

(K,H3O)Al2(Si3Al)O10(H2O,OH)2

monoklin : 2/m : C2/c

VIII/H.13-030

'Glauconite'

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

monoklin : 2/m : C2/m

VIII/H.13-040

Other languages

Dutch

Illiet

Estonian

Illiit

German

Illit

Spanish

Illita

English

Illite

Ukrainian

Іліт

Russian

Иллит

Hebrew

איליט

Simplified Chinese

伊利石

Alternative Name

Glimmerton

Esperanto

Ilito

Killianite

Japanese

イライト

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Иллит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Illit
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Locations with GPS information