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Andalusite

Pictures (62 Images total)

Chiastolith (Varietät des Andalusit)
Views (Image: 1206187409): 20212
Chiastolith (Varietät des Andalusit)

Fundort: Fluss Bio-Bio, Provinz Bio-Bio, VIII. Region, Chile; Größe: 3,5 x 3,5 cm

Collection: Michael Schwab (ms-mineralien)
Copyright: Mineralroli
Contribution: Mineralroli 2008-03-22
Locality: Bío-Bío, Provinz / Bío-Bío, Region (VIII. Region) / Chile
Andalusit
Views (Image: 1196889032): 9309
Andalusit

Gallwieser Alm, Lüsenstal, Sellraintal, Tirol, Österreich
(Bildbreite ca. 2,5 cm)

Collection: MichaelP
Copyright: MichaelP
Contribution: MichaelP 2007-12-05
Locality: Gallwieser Alm / Lüsenstal / Sellraintal / Innsbruck Land, Bezirk / Tirol / Österreich
Andalusit
Views (Image: 1260693237): 11165
Andalusit

Bildbreite: 10 mm; Fundort: Dolni Bory, Groß Meseritsch, Hochland, Tschechien

Copyright: Vitezslav Snasel
Contribution: slugslayer 2009-12-13
Locality: Dolni Bory / Bory / Žd'ár nad Sázavou (Saar), Okres / Hochland (Kraj Vysočina) / Tschechien
Andalusit
Views (Image: 1339433217): 10754
Andalusit

Fundort Egerer Waldhaus, Oberpfalz, Bayern, Bildhöhe 4 cm

Collection: berthold
Copyright: berthold
Contribution: berthold 2012-06-11
Andalusit (xx) mit Muskovit
Views (Image: 1521994587): 4365
Andalusit (xx) mit Muskovit

Steinbruch Dorfner, Stein bei Cossen im Chemnitztal/Sachsen; historischer Fund von Rudolf Nestler um 1940; Etikett mit Handschrift von Rudolf Herre (1903-1989); Größen 6 x 6 cm und 5 x 3 cm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2018-03-25
Locality: Steinbruch Dorfner / Cossen / Burgstädt / Mittelsachsen, Landkreis / Sachsen / Deutschland
Andalusit
Views (Image: 1198964495): 8771
Andalusit

stängelige weißliche Kristalle in Alaunschiefer von Gefrees, Lesesteinfund 1982 am Transformatorentürmchen zwischen Gottmannsberg und Schamlesberg, Kristalle bis 12 mm.

Collection: Manfred Früchtl
Copyright: Manfred Früchtl
Contribution: Manfred Früchtl 2007-12-29
Locality: Gottmannsberg / Gefrees / Bayreuth, Landkreis / Oberfranken, Bezirk / Bayern / Deutschland

Collectors Summary

Color braun, rosa, rötlich, grünlich
Streak color farblos
Lustre Glasglanz
Hardness (Mohs) 6.5 - 7.5
Solubility +++ HF nur
Crystal System orthorhombisch, Pnnm
Morphology Säulige Aggregate, kompakt, massiv

Chemism

Chem­ical formula

Al2SiO5

Chem­ical com­po­si­tion

Aluminium, Silicium, Sauerstoff

Unit weight: 162.0457564 u; Number of atoms in the formula: 8

Info

Empirical formula:

Al2SiO5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

49.37

5

62.50

15.9994300

79.9971500

Aluminium

Al

33.30

2

25.00

26.9815382

53.9630764

Silicon

Si

17.33

1

12.50

28.0855300

28.0855300

Anal­y­sis wt%

SiO2 : 36.45, Al2O3 : 61.03, Fe2O3 : 1.48, CaO : 0.78

Strunz 9th edi­tion incl. updates

9.AF.10

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
10:Andalusit-Gruppe

Lapis Clas­sifica­tion

VIII/B.02-020

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
2: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]

Clas­sifica­tion by Hölzel

9.AG.120

9: SILICATES
A: Nesosilicates
G: Nesosilicates with Cation: O
1: C small Sillimanite-Group

Dana 8th edi­tion

52.02.02b.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
02: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
02b: AL2SIO5 Andalusite subgroup)

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Andalusite group

Optical Properties

Color

braun, rosa, rötlich, grünlich

Streak color

farblos

Lus­tre

Glasglanz

max. Birefrin­gence

0.011

Birefringence chart\! Andalusite title=Birefringence chart Andalusite

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

1.632

RI value β

1.638

RI value γ / ε

1.643

Ri mean

1.638

2V angle

Biaxial (-) 80°~

Optical Data Luminescence

Color SW-UV (254nm)

 

grünlich

SW-UV Other Col­ors

       

gelblich weiß, blassgelb, gelb, grünlich weiß

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnnm

Cell param­e­ters a (Å)

7.800

Cell param­e­ters b (Å)

7.898

Cell param­e­ters c (Å)

5.561

Cell param­e­ters a/b or c/a

0.988

Cell param­e­ters c/b

0.704

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

342.582

X-Ray Pow­der Diffrac­tion

5.563(60),
4.53(100),
3.92(40),
3.52(30),
2.777(90),
2.484(30),
2.274(40),
2.174(80)

XRD chart Andalusite

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

Morphol­ogy

Säulige Aggregate, kompakt, massiv

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6.5 - 7.5

VHN (Hard­ness Vick­ers)

1354 (100g)

Density (g/cm³)

3.13 - 3.16

3.142 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HF nur

Preface

Occurrences

Weltweit

Gen­er­a­tion con­di­tions

Andalusit entsteht bei niedrigem Druck durch thermische Metamorphose in metamorphem Gesteinen.

Asso­cia­tions

Sillimanit, Cordierit, Kyanit, Granat, Korund, Turmalin, Glimmer

Name from

dem Fundort in Andalusien, Spanien

Author (Name, Year)

Delamétherie, 1798

Rel­evance, Usage

Wird zur Herstellung von hochfeuerfesten Werkstoffen, zum Beispiel von Isolatoren, verwendet.

Detailed description

Fundstellen

References

Dahaoui, S., Ghermani, N.E., Ghose, S., and Howard, J.A.K. (2001) Electric field gradient tensors at the aluminum sites in the Al2SiO5 polymorphs from CCD high resolution X-ray diffraction data: comparison with 27 Al NMR results. American Mineralogist: 86: 159-164.

Reviews in Mineralogy 22 (1990)

Strunz Mineralogical Tables 9. Edition (2001), 547.

Burt, J.B., Ross, N.L., Angel, R.J., and Koch, M. (2006) Equations of state and structures of andalusite to 9.8 GPa and sillimanite to 8.5 GPa. American Mineralogist: 91: 319-326.

American Mineralogist: 91: 740-746.

IMA / CNMNC Liste 2007, Strunz Id Änderung 9.AF.05 -> 9.AF.10

Michail N. Taran, Monika Koch-Müller: Optical absorption of electronic Fe–Ti charge-transfer transition in natural andalusite: the thermal stability of the charge-transfer band. Physics and Chemistry of Minerals Vol. 38, Nr. 3 (2011) S.215-222.

IMA group assignments


 
 
Zn2(AsO4)(OH)
orthorhombisch
Pnnm


 
 
Al2SiO5
orthorhombisch
Pnnm


 
 
Mn2(AsO4)(OH)
orthorhombisch
Pnnm

 
 
(Mn3+,Al)AlSiO5
orthorhombisch
Pnnm

 
 
Cu2(PO4)(OH)
orthorhombisch
Pnnm


 
 
Cu2AsO4(OH)
monoklin
P21/n

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Actuality: 16. May 2022 - 12:32:36

Varieties

Chiastolite

Andalusit-Varietät mit gekreuzten Einschlüssen aus Kohlenstoff

Chrysanthemum Stone

Keine Varietät im herkömmlichen Sinne, sondern ein Aggregat (blütenartig, blättrig).

Viridine

Other languages

French

Andalousite

Spanish

Andalucita

Dutch

Andalusiet

Estonian

Andalusiit

German

Andalusit

English

Andalusite

Bosnian (Latin Script)

Andaluzit

Croatian

Andaluzit

Romanian

Andaluzit

Esperanto

Andaluzito

Polish

Andaluzyt

Hungarian

Andalúzit

Lithuanian

Andalūzitas

Russian

Андалузит

Serbian (Cyrillic Script)

Андалузит

Ukrainian

Андалузит

Bulgarian

Андалусит

Hebrew

אנדלוזיט

Japanese

紅柱石

Simplified Chinese

红柱石

Alternative Name

Spanish

Andalousita

Spanish

Andalusita

Portuguese

Andaluzita

Andaluzite

English

Apyre

Feldspath apyre

Jamesonite (of Leman)

German

Lohestit

Spanish

Lohestita

Lohestite

CNMNC symbol

Symbol

And

Rock part of

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Hint

- Essential mineral - Important for the classification of the rock.
- Accessory or non-essential mineral - this minerals are common, sometimes major part of, but are not always present.

Actuality: 16. May 2022 - 12:32:36

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

German pages

DeWikiPedia - search for: Andalusit
Google-Bilder-Suche - search for: Andalusit
Mineralienatlas.de (Forum) - search for: Andalusit

English pages

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

Russian pages

Webmineral.ru - search for: Андалузит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Andalusit
Crystal-Treasure.com - search for: Andalusit
Bosse - search for: Andalusit
Edelsteine Neuburg - Gundolf Fischer - search for: Andalusit

Locations with GPS information