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Tounkite

Pictures (1 Images total)

Tounkit und Bystrit
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1583654090
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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
Location: Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Baikalsee/Sljudjanka (Sludyanka; Slyudyanka)/Tounskinskaya-Tal/Malo-Bystrinskoye
Mineral: Bystrite, Tounkite
Image: 1583654090
License: Usage for Mineralienatlas project only
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 trigonal, P321

Chemism

Chemical formula

(Na+3.89–5.18K+0.15–1.64Ca2+2.30–2.58(Al6Si6O24)(SO42−,S52−,S4)2−x (Cl, HS)1+y·nH2O (x, y, n < 1)
Formel abgeändert nach Untersuchungen am Typmaterial und weiteren Proben, siehe Nikita V. Chukanov, Nadezhda B. Bolotina, Roman Yu. Shendrik, Anatoly N. Sapozhnikov, Natalia V. Zubkova, Igor V. Pekov, Marina F. Vigasina, Fedor D. Sandalov, Dmitry A. Ksenofontov: Crystal Chemistry and Refined Formula of Tounkite. Minerals Vol. 14, Nr. 4 (2024) Art.-Nr. 382.

Empirical formula (analysis)

Na3.89K1.64Ca2.30(Al6.04Si5.96O24)(SO4)1.30(S52−)0.2Cl1.08·nH2O
Probe von Malo-Bystrinskoe, Lit. Chukanov et al. (2024)

Chemical composition

Aluminium, Argon, Calcium, Chlor, Chrom, Eisen, Natrium, Nickel, Praseodymium, Rhenium, Silicium, Yttrium, Bor, Fluor, Iod, Kalium, Kohlenstoff, Phosphor, Sauerstoff, Schwefel, Stickstoff, Uran, Vanadium, [Was

Unit weight: 1344.000122006 u; Number of atoms in the formula: 59.41

Info

Empirical formula:

Na3.89K1.64Ca2.30(Al6.04Si5.96O24)(SO4)1.30(S5)0.2Cl1.08·nH2O
ProbevonMalo-Bystrinskoe,Lit.Chukanovetal.(2024)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.15

2

3.37

1.0079470

2.0158940

Lithium

Li

0.52

1

1.68

6.9412000

6.9412000

Boron

B

0.80

1

1.68

10.8117000

10.8117000

Carbon

C

0.89

1

1.68

12.0107800

12.0107800

Oxygen

O

35.95

30.2

50.83

15.9994300

483.1827860

Sodium

Na

6.65

3.89

6.55

22.9897702

89.4302061

Aluminium

Al

12.13

6.04

10.17

26.9815382

162.9684907

Silicon

Si

12.45

5.96

10.03

28.0855300

167.3897588

Sulfur

S

5.49

2.3

3.87

32.0655000

73.7506500

Chlorine

Cl

2.85

1.08

1.82

35.4532000

38.2894560

Potassium

K

4.77

1.64

2.76

39.0983100

64.1212284

Calcium

Ca

6.86

2.3

3.87

40.0784000

92.1803200

Praseodymium

Pr

10.48

1

1.68

140.9076520

140.9076520

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

trigonal

Class (H-M)

32

Space Group number

150

Space Group

P321

Cell parameters a (Å)

12.8492(4)

Cell parameters b (Å)

-

Cell parameters c (Å)

32.2924(10)

Cell parameters a/b or c/a

2.513

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

6

Volume (ų)

4617.247

Crystal structure

vollständig geklärt, siehe Nikita V. Chukanov, Nadezhda B. Bolotina, Roman Yu. Shendrik, Anatoly N. Sapozhnikov, Natalia V. Zubkova, Igor V. Pekov, Marina F. Vigasina, Fedor D. Sandalov, Dmitry A. Ksenofontov: Crystal Chemistry and Refined Formula of Tounkite. Minerals Vol. 14, Nr. 4 (2024) Art.-Nr. 382.

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)

2.9 ( 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.

Nikita V. Chukanov, Nadezhda B. Bolotina, Roman Yu. Shendrik, Anatoly N. Sapozhnikov, Natalia V. Zubkova, Igor V. Pekov, Marina F. Vigasina, Fedor D. Sandalov, Dmitry A. Ksenofontov: Crystal Chemistry and Refined Formula of Tounkite. Minerals Vol. 14, Nr. 4 (2024) Art.-Nr. 382. Open Access; DOI: 10.3390/min14040382

Other languages

German

Tounkit

Spanish

Tounkita

French

Tounkite

English

Tounkite

Russian

Тункит

CNMNC (IMA)-Number

IMA 1990-009

CNMNC symbol

Symbol

Tou

Locations with GPS information

IDs

GUSID (Global unique identifier short form) qL7J39YY90KStVLUrs9Xdg
GUID (Global unique identifier) DFC9BEA8-18D6-42F7-92B5-52D4AECF5776
Database ID 3884