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Kyanite

Pictures (135 Images total)

schwarzer Disthen
Views (Image: 1248292552): 13735
schwarzer Disthen

Stufe 63x55 mm, Taquaral, Minas Gerais, Brasilien
Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2009-07-22
Locality: Taquaral / Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Kyanite
Views (Image: 1457760476): 10316
Kyanite

Perfect quality kyanite specimen, from São José da Safira, Doce valley, Minas Gerais, Brazil; Size 92 х 83 х 28 mm
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2016-03-12
Locality: São José da Safira / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Kyanite
Views (Image: 1487400312): 3537
Kyanite

Perfect quality, kyanite V-twin specimen, from Nani Hill, Loliondo, Ngorongoro district, Arusha Region, Tanzania; Size 30 х 25 х 10 mm
Copyright: pegmatite
Contribution: pegmatite 2017-02-18
Locality: Nani / Loliondo / Arusha, Region / Tansania
Kyanite
Views (Image: 1392224645): 11258
Kyanite

Perfect quality kyanite specimen, from São José da Safira, Doce valley, Minas Gerais, Brazil; Size 140 х 55 х 45 mm
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2014-02-12
Locality: São José da Safira / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Kyanite
Views (Image: 1400248391): 10192
Kyanite

Perfect quality kyanite crystal, from Dhaulagari valley, Kali Gandaki river region, West Central, Nepal; Size 62 х 20 х 8 mm
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2014-05-16
Locality: Gandaki, Provinz / Nepal
Kyanite
Views (Image: 1471797026): 1487
Kyanite

Perfect quality kyanite specimen, from São José da Safira, Doce valley, Minas Gerais, Brazil; Size 115 х 88 х 45 mm
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2016-08-21
Locality: São José da Safira / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien

Collectors Summary

Color blau, weiß, grau, grün, schwarz, gelb, orange
Streak color weiß
Lustre Glasglanz, Perlmuttglanz
Hardness (Mohs) 5.50 - 7.00 (4,5 bis 5,5 || 001; 6 bis 7 || 010)
Cleavages vollkommen nach {100}; deutlich nach {010}, Absonderungen nach (001)
Fracture faserig nach (001), gewellt nach (100)
Solubility - Säuren
Crystal System triklin, P1

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 : 36.76, Al2O3 : 62.74 (Ref: American Mineralogist 56)

Strunz 9th edi­tion incl. updates

9.AF.15

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

Lapis Clas­sifica­tion

VIII/B.02-040

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

Clas­sifica­tion by Hölzel

9.AG.150

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

Dana 8th edi­tion

52.02.02c.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
02c: Al2SiO5 (Kyanite subgroup)

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

blau, weiß, grau, grün, schwarz, gelb, orange

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend bis transparent

Lus­tre

Glasglanz, Perlmuttglanz

max. Birefrin­gence

0.015
Birefringence chart\! Kyanite title=Birefringence chart Kyanite

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

1.712

RI value β

1.722

RI value γ / ε

1.727

Ri mean

1.720

2V angle

Biaxial (-) 75°

Optical Data Luminescence

Color LW-UV (365nm)

  

rot

LW-UV Intensity

sehr schwach

Color SW-UV (254nm)

  

rot

SW-UV Intensity

sehr schwach

After­glow (Per­sistant Lumi­nes­cence)

Mit bloßem Auge konnte keine Phosphoreszenz festgestellt werden.

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell param­e­ters a (Å)

7.10

Cell param­e­ters b (Å)

7.74

Cell param­e­ters c (Å)

5.57

Cell param­e­ters a/b or c/a

0.917

Cell param­e­ters c/b

0.720

Cell param­e­ters α

90.10

Cell param­e­ters β

101.3

Cell param­e­ters γ

105.75

Z

4

Volumne (ų)

288.401

X-Ray Pow­der Diffrac­tion

3.35(100),
3.18(60),
2.696(40),
2.509(50),
2.350(40),
2.159(20),
1.960(50),
1.929(80)
XRD chart Kyanite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.50 - 7.00 (4,5 bis 5,5 || 001; 6 bis 7 || 010)

VHN (Hard­ness Vick­ers)

771 (50g)!

Density (g/cm³)

3.56 - 3.67 / Durchschnittlich = 3.61

3.732 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen nach {100}; deutlich nach {010}, Absonderungen nach (001)

Frac­ture

faserig nach (001), gewellt nach (100)

Insta­bil­ity

- Säuren

Chem­ical Prop­er­ties and Tests

in HF nur schwer löslich

Preface

Occurrences

in metamorphem Gestein, komprimiert durch hohe Temperatur und hohem Druck, zB Gneis, aber auch in Pegmatit.

Name from

dem griechischen kyanos - blau

Author (Name, Year)

Werner, 1789

Rel­evance, Usage

wird zur Herstellung feuerfester Stoffe verwendet

Addi­tional Informa­tion

Der Name Kyanit ist aus dem Griechischen und bedeutet `dunkelblau`. Der alternative Name Disthen steht für `Zwei Härten`.

References

Reviews in Mineralogy 22 (1990)

Other languages

Spanish

Cianita

French

Cyanite

Polish

Dysten

Esperanto

Kianito

Dutch

Kyaniet

Finnish

Kyaniitti

German

Kyanit

Swedish

Kyanit

English

Kyanite

Estonian

Küaniit

Russian

Кианит

Hebrew

קיאניט

Simplified Chinese

蓝晶石

Japanese

藍晶石

Alternative Name

English

Chromdisthene

German

Cianit

English

Cianite

German

Cyanit

Distene

Disthen

English

Disthene

French

Disthène

Croatian

Kianit

Hungarian

Kianit

Spanish

Kyanita

German

Munkrudit

Spanish

Munkrudita

English

Munkrudite

Rhaeticite

English

Rhaetizite

German

Rhätizit

German

Riemenstein

German

Saphirspath

English

Sapparite

Hebrew

קיאנייט

CNMNC symbol

Symbol

Ky

Rock part of

 
Rocks

 
 
metamorphic rocks and metasediments

 
 
 
foliated metamorphic rock

 
 
 
 
non-mylonitic foliated metamorphic rock

 
 
 
 
 
schistose rock

 
 
 
 
 
 
schist

 
 
 
 
 
 
 
greenschist

 
 
 
 
 
 
 
 
Leucophyllite  

 
 
 
 
 
 
 
mica schist

 
 
 
 
 
 
 
 
garnet mica schist

 
 
 
 
 
 
 
 
 
Disthen-Granat-Glimmerschiefer  

 
 
 
 
 
 
 
 
 
 
radentheinite  

Refresh list | View legend

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: 10. May 2022 - 00:19:28

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

German pages

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

English pages

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

Russian pages

 Webmineral.ru - search for: Кианит

Mineral Dealer

German pages

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

Locations with GPS information