https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Törnebohmite-(La)

Pictures (2 Images total)

Törnebohmit-(La)-Kristall
Views (Image: 1245042744): 846
Törnebohmit-(La)-Kristall

Kristallgröße: 0,5 mm; Fundort: Mochalin, Kyschtym, Tscheljabinsk Oblast, Ural, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-15
Locality: Mochalin Log (Мочалин лог) / Kyschtym (Kishtim) / Tscheljabinsk, Oblast / Ural, Föderationskreis / Russland
Törnebohmit-(La) (blassgrün)
Views (Image: 1245042570): 761
Törnebohmit-(La) (blassgrün)

Bildbreite: 3 mm; Fundort: Mochalin, Kyschtym, Tscheljabinsk Oblast, Ural, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-15
Locality: Mochalin Log (Мочалин лог) / Kyschtym (Kishtim) / Tscheljabinsk, Oblast / Ural, Föderationskreis / Russland

Collectors Summary

Color grün
Streak color weiß
Hardness (Mohs) 4.00 - 5.00
Solubility ++ heiße konz. HCl
Crystal System monoklin, P21/c

Chemism

Chem­ical formula

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

Chem­ical com­po­si­tion

Aluminium, Cerium, Lanthanum, Silicium, Sauerstoff, Wasserstoff

Unit weight: 506.5717452 u; Number of atoms in the formula: 15

Info

Empirical formula:

(La0.75Ce0.25)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

28.43

9

60.00

15.9994300

143.9948700

Aluminium

Al

5.33

1

6.67

26.9815382

26.9815382

Silicon

Si

11.09

2

13.33

28.0855300

56.1710600

Lanthanum

La

41.13

1.5

10.00

138.9055200

208.3582800

Cerium

Ce

13.83

0.5

3.33

140.1161000

70.0580500

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.19-020

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

Clas­sifica­tion by Hölzel

9.AI.510

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

Dana 8th edi­tion

52.04.05.02

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

grün

Streak color

weiß

max. Birefrin­gence

0.027

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

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

1.848

RI value β

1.850

RI value γ / ε

1.875

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)

7.401

Cell param­e­ters b (Å)

5.702

Cell param­e­ters c (Å)

17.072

Cell param­e­ters a/b or c/a

1.298

Cell param­e­ters c/b

2.994

Cell param­e­ters α

90°

Cell param­e­ters β

112.40

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

666.086

X-Ray Pow­der Diffrac­tion

7.85(30),
4.598(70),
3.479(40),
3.089(100),
2.837(40),
2.823(70),
2.624(60),
2.184(40)

XRD chart Törnebohmite-(La)

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.00 - 5.00

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.05 (berechnet)

5.051 ( ρ calc. Mineralienatlas )

Insta­bil­ity

++ heiße konz. HCl

Preface

Author (Name, Year)

Geijer, 1921

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 813

Other languages

German

Törnebohmit-(La)

Spanish

Törnebohmita-(La)

English

Törnebohmite-(La)

French

Törnebohmite-(La)

Russian

Торнебомит-(La)

CNMNC symbol

Symbol

Tbh-La

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

German pages

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

English pages

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

Russian pages

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

Mineral Dealer

German pages

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

Locations with GPS information