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Tounkite

Pictures (1 Images total)

Tounkit und Bystrit
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Tounkit und Bystrit

blaugrüne Massen von Tounkit neben gelben Bystrit, blauem Lazulith und weißem Calcit, Malo-Bystrinskoye, Sljudjanka, Baikalsee, Irkutsk, Russland; BB 2 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-08
Locality: Malo-Bystrinskoye / Tounskinskaya-Tal / Sljudjanka (Sludyanka; Slyudyanka) / Baikalsee / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland

Collectors Summary

Color flaschengrün, gelblichgrün
Streak color weiß
Hardness (Mohs) 5.00 - 5.50
Cleavages mittelmäßig {100}
Solubility +++ HCl
Crystal System hexagonal, P6222

Chemism

Chem­ical formula

(Na,Ca,K)8[Cl|(SO4)2|Al6Si6O24]

Chem­ical com­po­si­tion

Aluminium, Calcium, Chlor, Natrium, Silicium, Kalium, Sauerstoff, Schwefel

Unit weight: 1179.78607416 u; Number of atoms in the formula: 55

Info

Empirical formula:

(Na0.6Ca0.3K0.1)8[Cl(SO4)2Al6Si6O24]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

43.40

32

58.18

15.9994300

511.9817600

Sodium

Na

9.35

4.8

8.73

22.9897702

110.3508970

Aluminium

Al

13.72

6

10.91

26.9815382

161.8892292

Silicon

Si

14.28

6

10.91

28.0855300

168.5131800

Sulfur

S

5.44

2

3.64

32.0655000

64.1310000

Chlorine

Cl

3.01

1

1.82

35.4532000

35.4532000

Potassium

K

2.65

0.8

1.45

39.0983100

31.2786480

Calcium

Ca

8.15

2.4

4.36

40.0784000

96.1881600

Anal­y­sis wt%

SiO2 : 30.71, Al2O3 : 25.43, CaO : 10.82, Na2O : 10.25, K2O : 6.46, SO3 : 13.28, Cl : 2.90, H2O : 0.77 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 92)

Strunz 9th edi­tion incl. updates

9.FB.05

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
05:Cancrinit-Gruppe

Lapis Clas­sifica­tion

VIII/J.09-055

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
9: Mit tetraederfremden Anionen; Cancrinit-Gruppe

Clas­sifica­tion by Hölzel

9.FE.230

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
2: Liottite-Group - hexagonal, axis for a~~12A and c=n*~~5A, n>1

Dana 8th edi­tion

76.02.05.14

76: Tektosilicates Tectosilicate Al-Si Framework
02: Tektosilicates Tectosilicate Al-Si Framework Feldspathoids and related species
05: Cancrinite group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

flaschengrün, gelblichgrün

Streak color

weiß

max. Birefrin­gence

0.015

Birefringence chart\! Tounkite title=Birefringence chart Tounkite

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

1.528

RI value γ / ε

1.543

Ri mean

1.533

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

622

Space Group number

180

Space Group

P6222

Cell param­e­ters a (Å)

12.843

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

32.239

Cell param­e­ters a/b or c/a

2.510

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

6

Volumne (ų)

4605.165

X-Ray Pow­der Diffrac­tion

4.84(40),
3.711(100),
3.314(80),
3.035(20),
2.988(20),
2.687(20),
2.470(20),
2.139(20)

XRD chart Tounkite

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.00 - 5.50

VHN (Hard­ness Vick­ers)

470 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.557 (gemessen)

2.552 ( ρ calc. Mineralienatlas )

Cleav­ages

mittelmäßig {100}

Insta­bil­ity

+++ HCl

Preface

Author (Name, Year)

Ivanov & Sapozhnikov & Piskunova & Kashayev, 1992

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 121 (1992) (2), 92

Other languages

German

Tounkit

Spanish

Tounkita

French

Tounkite

English

Tounkite

Russian

Тункит

CNMNC (IMA)-Number

IMA 1990-009

CNMNC symbol

Symbol

Tou

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Тункит

Mineral Dealer

German pages

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

Locations with GPS information