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Törnebohmite-(Ce)

Pictures (3 Images total)

Torneböhmit-(Ce) und Ferriallanit-(Ce)
Views (Image: 1306014933): 1449
Torneböhmit-(Ce) und Ferriallanit-(Ce)

Gelbe Torneböhmit-(Ce)- und schwarze Ferriallanit-(Ce)-Körner in Calcit; Bildbreite: 5 mm; Fundort: Biraya, Bodaibo-Stadt, Irkutsk Oblast, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2011-05-21
Locality: Biraya Fe-SE-Vorkommen / Bodaibo, Distrikt / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland
Yttrofluorit, Torneböhmit-(Ce)
Views (Image: 1308513706): 1766
Yttrofluorit, Torneböhmit-(Ce)

Größe: 60x35x33 mm; Fundort: Stetind, Tysfjord, Provinz Nordland, Norwegen

Copyright: slugslayer
Contribution: slugslayer 2011-06-19
Locality: Stetind / Tysfjord / Nordland, Provinz / Norwegen
Thörnebohmit-(Ce) (schwarz) und Cerit-(Ce) (grau-rosa)
Views (Image: 1555077174): 415
Thörnebohmit-(Ce) (schwarz) und Cerit-(Ce) (grau-rosa)

Bastnäs, Riddarhyttan, Västmansland, Schweden. 5,5x4cm.

Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2019-04-12
Locality: Bastnäs / Riddarhyttan / Skinnskatteberg / Västmanlands, Provinz / Schweden

Collectors Summary

Color olivgrün
Streak color weiß
Hardness (Mohs) 4.5
Solubility ++ heiße konz. HCl
Crystal System monoklin, P21/c

Chemism

Chem­ical formula

(Ce,La)2Al(SiO4)2(OH)

Chem­ical com­po­si­tion

Aluminium, Cerium, Lanthanum, Silicium, Sauerstoff, Wasserstoff

Unit weight: 507.7823252 u; Number of atoms in the formula: 15

Info

Empirical formula:

(Ce0.75La0.25)2Al(SiO4)2(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.20

1

6.67

1.0079470

1.0079470

Oxygen

O

28.36

9

60.00

15.9994300

143.9948700

Aluminium

Al

5.31

1

6.67

26.9815382

26.9815382

Silicon

Si

11.06

2

13.33

28.0855300

56.1710600

Lanthanum

La

13.68

0.5

3.33

138.9055200

69.4527600

Cerium

Ce

41.39

1.5

10.00

140.1161000

210.1741500

Strunz 9th edi­tion incl. updates

9.AG.45

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
45:

Lapis Clas­sifica­tion

VIII/B.19-030

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
19: Kationen mit Koordinationszahlen zwischen [8] und [12]

Clas­sifica­tion by Hölzel

9.AI.500

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
5: With REE's

Dana 8th edi­tion

52.04.05.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
04: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or > [6] coordination
05: Tornebohmite group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

olivgrün

Streak color

weiß

max. Birefrin­gence

0.033

Birefringence chart\! Törnebohmite-(Ce) title=Birefringence chart Törnebohmite-(Ce)

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

1.845

RI value β

1.852

RI value γ / ε

1.878

Ri mean

1.858

2V angle

Biaxial (+) 26°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell param­e­ters a (Å)

7.383

Cell param­e­ters b (Å)

5.673

Cell param­e­ters c (Å)

16.937

Cell param­e­ters a/b or c/a

1.301

Cell param­e­ters c/b

2.986

Cell param­e­ters α

90°

Cell param­e­ters β

112.3

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

656.33

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.5

VHN (Hard­ness Vick­ers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.17 (berechnet)

5.139 ( ρ calc. Mineralienatlas )

Insta­bil­ity

++ heiße konz. HCl

Preface

Author (Name, Year)

Geijer, 1921

References

American Mineralogist 51 (1966), 152

Other languages

German

Törnebohmit-(Ce)

Spanish

Törnebohmita-(Ce)

English

Törnebohmite-(Ce)

French

Törnebohmite-(Ce)

Russian

Торнебомит-(Ce)

CNMNC symbol

Symbol

Tbh-Ce

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Торнебомит-(Ce)

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Törnebohmit-(Ce)
Crystal-Treasure.com - search for: Törnebohmit-(Ce)
Bosse - search for: Törnebohmit-(Ce)
Edelsteine Neuburg - Gundolf Fischer - search for: Törnebohmit-(Ce)

Locations with GPS information