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Thornasite

Pictures (5 Images total)

Thornasit
Views (File:
1244928344
): 1994
Thornasit
Bildbreite: 2 mm; Fundort: Aris, Windhoek, Windhoek District, Khomas Region, Namibia
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1244928344
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Thornasit

Bildbreite: 2 mm; Fundort: Aris, Windhoek, Windhoek District, Khomas Region, Namibia

Copyright: Stephan Wolfsried
Contribution: Hg 2009-06-13
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia
Thornasit
Views (File:
1567018796
): 511
Thornasit
Thornasit (Aris/Namibia; BB 1.8 mm)
Copyright: Lynx; Contribution: Lynx
Collection: Lynx
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1567018796
License: Usage for Mineralienatlas project only
Thornasit  E
Analysed with energy dispersive X-ray spectroscopy EDX

Thornasit (Aris/Namibia; BB 1.8 mm)

Collection: Lynx
Copyright: Lynx
Contribution: Lynx 2019-08-28
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia
Thornasit
Views (File:
1693583484
): 34
Thornasit
stängelige, hell gelbbraune Thornasit Kristalle. BB = 6 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Copyright: horst knoll; Contribution: horst knoll
Collection: horst knoll
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1693583484
License: Usage for Mineralienatlas project only
Thornasit

stängelige, hell gelbbraune Thornasit Kristalle. BB = 6 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)

Collection: horst knoll
Copyright: horst knoll
Contribution: horst knoll 2023-09-01
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia
Thornasit
Views (File:
1693583573
): 33
Thornasit
stängelige, hell gelbbraune Thornasit Kristalle. BB = 4,5 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Copyright: horst knoll; Contribution: horst knoll
Collection: horst knoll
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1693583573
License: Usage for Mineralienatlas project only
Thornasit

stängelige, hell gelbbraune Thornasit Kristalle. BB = 4,5 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)

Collection: horst knoll
Copyright: horst knoll
Contribution: horst knoll 2023-09-01
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia
Thornasit
Views (File:
1693583646
): 35
Thornasit
stängelige, hell gelbbraune Thornasit Kristalle. BB = 3,5 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Copyright: horst knoll; Contribution: horst knoll
Collection: horst knoll
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1693583646
License: Usage for Mineralienatlas project only
Thornasit

stängelige, hell gelbbraune Thornasit Kristalle. BB = 3,5 mm. Modified by CombineZP; Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)

Collection: horst knoll
Copyright: horst knoll
Contribution: horst knoll 2023-09-01
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia

Collectors Summary

Color farblos, blassgrün
Streak color weiß
Lustre Glasglanz bis Wachsglanz
Solubility ++ verdünnte HCl, - verdünnte HNO3 oder H2SO4
Crystal System trigonal, R3c

Chemism

Chemical formula

Na12Th3(Si8O19)4 ·18H2O

Chemical composition

Natrium, Silicium, Thorium, Sauerstoff, Wasserstoff

Unit weight: 3410.9610444 u; Number of atoms in the formula: 177

Info

Empirical formula:

Na12Th3(Si8O19)4·18H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.06

36

20.34

1.0079470

36.2860920

Oxygen

O

44.09

94

53.11

15.9994300

1,503.9464200

Sodium

Na

8.09

12

6.78

22.9897702

275.8772424

Silicon

Si

26.35

32

18.08

28.0855300

898.7369600

Thorium

Th

20.41

3

1.69

232.0381100

696.1143300

Analysis wt%

Ø SiO2 : 57.93, Al2O3 : 1.42, ThO2 : 22.45, UO2 : 0.88, Na2O : 1.55, K2O : 1.10, F : 0.40, H2O : 13.76 (Ref: Canadian Mineralogist 87)

Strunz 9th edition incl. updates

9.GF.50

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
F: [Leucit]-Typ-Gerüste
50:Thornasit-Gruppe

Lapis Classification

VIII/J.20-040

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
20: Gerüstsilikate mit Zeolithstruktur

Classification by Hölzel

9.FL.360

9: SILICATES
F: Tektosilicates
L: Zeolites with 6-Rings

Dana 8th edition

72.01.02.01

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
01: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Zeolite group  ⇒ unassigned zeolite structure group

Optical Properties

Color

farblos, blassgrün

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

Lustre

Glasglanz bis Wachsglanz

max. Birefringence

0.002

Birefringence chart\! Thornasite title=Birefringence chart Thornasite

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

1.510

RI value γ / ε

1.512

Ri mean

1.511

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

 

grün

LW-UV Intensity

stark

Color SW-UV (254nm)

 

grün

SW-UV Intensity

stark

Most Common Activator

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

Afterglow (Persistant Luminescence)

keine Daten

Image ⇒ Luminescence ⇒ excitation ⇒ UV longwave ~365nm (1 Images total)

Thornasit unter UV 360 nm
Views (File:
1567018931
): 406
Thornasit unter UV 360 nm
Thornasit. Unter 360 nm Anregung luminesziert dieser Kristall deutlich grüngelb. (Aris/Namibia; BB 1.8 mm).
Copyright: Lynx; Contribution: Lynx
Collection: Lynx
Location: Namibia/Khomas, Region/Windhoek-Land, Kreis/Aris/Aris-Steinbrüche (Ariskop Quarry; Railway Quarry)
Mineral: Thornasite
Image: 1567018931
License: Usage for Mineralienatlas project only
Thornasit unter UV 360 nm  E
Analysed with energy dispersive X-ray spectroscopy EDX

Thornasit. Unter 360 nm Anregung luminesziert dieser Kristall deutlich grüngelb. (Aris/Namibia; BB 1.8 mm).

Collection: Lynx
Copyright: Lynx
Contribution: Lynx 2019-08-28
Locality: Aris-Steinbrüche (Ariskop Quarry; Railway Quarry) / Aris / Windhoek-Land, Kreis / Khomas, Region / Namibia

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

167

Space Group

R3c

Cell parameters a (Å)

29.124

Cell parameters b (Å)

-

Cell parameters c (Å)

17.260

Cell parameters a/b or c/a

0.593

Cell parameters c/b

-

Z

6

Volume (ų)

12678.663

X-Ray Powder Diffraction

14.54(20),
8.17(30),
7.27(100),
5.09(20),
4.17(70),
3.239(30),
2.959(20),
2.890(20)

XRD chart Thornasite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.62 (gemessen)

2.68 ( ρ calc. Mineralienatlas )

Radioactivity

radioaktiv

Instability

++ verdünnte HCl, - verdünnte HNO3 oder H2SO4

Preface

Associations

Brookit, Yofortierit, Analcim, Eudialyt, Serandit, Polylithionit, Leifit, Natrolith, Mikroklin, Albit, Mn-Neptunit, Steacyit, Katapleit, Epididymit, Calcit

Rareness

sehr selten

Name from

Zusammensetzung

Author (Name, Year)

Ansell & Chao, 1987

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

Canadian Mineralogist 25 (1987), 181

IMA group assignments

Other languages

German

Thornasit

English

Thornasite

French

Thornasite

Spanish

Tornasita

Russian

Торнасит

Alternative Name

Spanish

Thornasita

CNMNC (IMA)-Number

IMA 1985-050

CNMNC symbol

Symbol

Tna

Locations with GPS information

IDs

GUSID (Global unique identifier short form) tLpjeK0bJECPoKJI2I0JOA
GUID (Global unique identifier) 7863BAB4-1BAD-4024-8FA0-A248D88D0938
Database ID 3834