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Turkestanite (Turkestanit)

Pictures (2 Images total)

Turkestanit XX
Views (File:
1209413013
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Turkestanit XX
Größe: 3.5 x 2 x 2.5 cm; Fundort: Dzhelisu Massif, Khodzhaachkan-Fluss, Alai Range, Osh Oblast, Kirgistan
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Collection: Pavel Kartashov
Location: Kirgistan/Osch (Osh), Oblast/Alai-Hochgebirge/Dzhelisu-Massiv
Mineral: Turkestanite
Image: 1209413013
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Turkestanit XX

Größe: 3.5 x 2 x 2.5 cm; Fundort: Dzhelisu Massif, Khodzhaachkan-Fluss, Alai Range, Osh Oblast, Kirgistan
Collection: Pavel Kartashov
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2008-04-28
Locality: Dzhelisu-Massiv / Alai-Hochgebirge / Osch (Osh), Oblast / Kirgistan
Turkestanit XX
Views (File:
1209413474
): 983
Turkestanit XX
Größe: 4 x 4 x 2.5 cm; Fundort: Dzhelisu Massif, Khodzhaachkan-Fluss, Alai Range, Osh Oblast, Kirgistan
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Collection: Pavel Kartashov
Location: Kirgistan/Osch (Osh), Oblast/Alai-Hochgebirge/Dzhelisu-Massiv
Mineral: Turkestanite
Image: 1209413474
License: Usage for Mineralienatlas project only
Turkestanit XX

Größe: 4 x 4 x 2.5 cm; Fundort: Dzhelisu Massif, Khodzhaachkan-Fluss, Alai Range, Osh Oblast, Kirgistan
Collection: Pavel Kartashov
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2008-04-28
Locality: Dzhelisu-Massiv / Alai-Hochgebirge / Osch (Osh), Oblast / Kirgistan

Collectors Summary

Color gelblichgrün, braun
Streak color weiß
Hardness (Mohs) 5.50 - 6.00
Cleavages unvollkommen {111}
Fracture muschelig
Solubility - 15% HCl
Crystal System tetragonal, P4/mcc

Chemism

Chemical formula

Th(Ca,Na)2(K,)Si8O20•nH2O

Chemical composition

Calcium, Natrium, Silicium, Thorium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 905.4370691 u; Number of atoms in the formula: 35

Info

Empirical formula:

Th(Ca0.75Na0.25)2(K,)Si8O20•nH2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.22

2

5.71

1.0079470

2.0158940
Oxygen

O

37.11

21

60.00

15.9994300

335.9880300
Sodium

Na

1.27

0.5

1.43

22.9897702

11.4948851
Silicon

Si

24.82

8

22.86

28.0855300

224.6842400
Potassium

K

4.32

1

2.86

39.0983100

39.0983100
Calcium

Ca

6.64

1.5

4.29

40.0784000

60.1176000
Thorium

Th

25.63

1

2.86

232.0381100

232.0381100

Analysis wt%

SiO2 : 54.58, ThO2 : 23.43, UO2 : 1.93, Ln2O3 : 1.50, PbO : 0.94, CaO : 7.56, Na2O : 2.89, K2O : 4.54, H2O : 1.76 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 97)

Strunz 9th edition incl. updates

9.CH.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
H: ~[Si4O12]9- vierer-Doppelringe
10:Steacyit-Gruppe

Lapis Classification

VIII/E.10-040

VIII: SILIKATE
E: Ringsilikate
10: Doppelte Viererringe [Si8O20] 8-

Classification by Hölzel

9.CB.810

9: SILICATES
C: Cyclosilicates
B: ~[Si4O12]8-, ~[Si4O10]4--Rings
8: Ekanite-Group

Dana 8th edition

63.01.01.03

63: Cyclosilicates Cyclosilicate Condensed Rings
01: Cyclosilicates Cyclosilicate Condensed Rings 4-membered rings
01: Steacyite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelblichgrün, braun

Streak color

weiß

max. Birefringence

0.005
Birefringence chart\! Turkestanite title=Birefringence chart Turkestanite

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

1.611

RI value γ / ε

1.606

Ri mean

1.609

2V angle

Uniaxial (-)

Optical Data Luminescence

Color SW-UV (254nm)

  

grün

Most Common Activator

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

124

Space Group

P4/mcc

Cell parameters a (Å)

7.592

Cell parameters b (Å)

-

Cell parameters c (Å)

14.824

Cell parameters a/b or c/a

1.953

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

854.433

X-Ray Powder Diffraction

7.60(30),
7.38(60),
5.36(30),
5.29(100),
3.393(80),
3.372(90),
3.309(80),
2.641(60)
XRD chart Turkestanite

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 - 6.00

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.36 (gemessen)

3.519 ( ρ calc. Mineralienatlas )

Cleavages

unvollkommen {111}

Fracture

muschelig

Tenacity

spröde

Instability

- 15% HCl

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)

Kirgistan/Osch (Osh), Oblast/Alai-Hochgebirge/Dzhelisu-Massiv

Preface

Author (Name, Year)

Pautov & Agakhanov & Sokolova & Kabalov, 1997

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 126 (1997) (6), 45

Other languages

German

Turkestanit

Spanish

Turkestanita

English

Turkestanite

French

Turkestanite

Russian

Туркестанит

Simplified Chinese

突厥斯坦石

CNMNC (IMA)-Number

IMA 1996-036

CNMNC symbol

Symbol

Tkt

Locations with GPS information