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Hectorite

Pictures (3 Images total)

Hectorit
Views (File:
1428779204
): 3369
Hectorit
Blumenkohlförmige weiße Kristalle, BB = 3,8 mm, Fundort: Puy Chalard, Vertaizon, Puy-de-Dôme, Auvergne, Frankreich.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A033305, Donator: anatase2
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Clermont-Ferrand, Arrondissement/Vertaizon/Puy Chalard
Mineral: Hectorite
Image: 1428779204
License: Usage for Mineralienatlas project only
Hectorit (SNr: A033305)

Blumenkohlförmige weiße Kristalle, BB = 3,8 mm, Fundort: Puy Chalard, Vertaizon, Puy-de-Dôme, Auvergne, Frankreich.

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2015-04-11
Locality: Puy Chalard / Vertaizon / Clermont-Ferrand, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich
Hectorit
Views (File:
1581771432
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Hectorit
Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Vertaizon. Bildbreite 1 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Clermont-Ferrand, Arrondissement/Vertaizon
Mineral: Hectorite
Image: 1581771432
License: Usage for Mineralienatlas project only
Hectorit

Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Vertaizon. Bildbreite 1 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2020-02-15
Locality: Vertaizon / Clermont-Ferrand, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich
Hectorit
Views (File:
1688288019
): 42
Hectorit
Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Clermont-Ferrand, Arrondissement/Vertaizon. Bildbreite 1,2 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Clermont-Ferrand, Arrondissement/Vertaizon
Mineral: Hectorite
Image: 1688288019
License: Usage for Mineralienatlas project only
Hectorit

Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Clermont-Ferrand, Arrondissement/Vertaizon. Bildbreite 1,2 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2023-07-02
Locality: Vertaizon / Clermont-Ferrand, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich

You find additional specimen at the Geolitho Museum

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 1.00 - 2.00
Solubility +++ HCl, + H2O
Crystal System monoklin,

Chemism

Chemical formula

Na0.3(Mg,Li)3Si4O10(F,OH)2

Chemical composition

Lithium, Magnesium, Natrium, Silicium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 376.126929435 u; Number of atoms in the formula: 19.8

Info

Empirical formula:

Na0.3(Mg0.75Li0.25)3Si4O10(F0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.13

0.5

2.53

1.0079470

0.5039735

Lithium

Li

1.38

0.75

3.79

6.9412000

5.2059000

Oxygen

O

44.66

10.5

53.03

15.9994300

167.9940150

Fluorine

F

7.58

1.5

7.58

18.9984033

28.4976049

Sodium

Na

1.83

0.3

1.52

22.9897702

6.8969311

Magnesium

Mg

14.54

2.25

11.36

24.3050600

54.6863850

Silicon

Si

29.87

4

20.20

28.0855300

112.3421200

Analysis wt%

SiO2 : 53.68, Al2O3 : 0.60, MgO : 25.34, Li2O : 1.12, CaO : 0.52, Na2O : 3.00, H2O : 15.52

Strunz 9th edition incl. updates

9.EC.40

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
40:Montmorillonit-Gruppe

Lapis Classification

VIII/H.20-010

VIII: SILIKATE
H: Schichtsilikate
20: Tonminerale, regulär geschichtet; Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Montmorillonit-Gruppe

Classification by Hölzel

9.EI.120

9: SILICATES
E: Phyllosilicates
I: Montmorillonite-Saponite-Group

IMA status

Status fragwürdig

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.021

Birefringence chart\! Hectorite title=Birefringence chart Hectorite

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

1.489

RI value β

1.499

RI value γ / ε

1.510

Ri mean

1.499

2V angle

Biaxial (-) 85°

Optical Data Luminescence

Color LW-UV (365nm)

 

bläulich weiß

LW-UV Intensity

mittel

Color SW-UV (254nm)

 

blau

SW-UV Intensity

mittel

LW-UV Other Colors

 

gelblich weiß

SW-UV Other Colors

 

weiß

Color SW-UV Afterglow (254nm)

 

bläulich weiß

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.25

Cell parameters b (Å)

9.18

Cell parameters c (Å)

16.00*

Cell parameters a/b or c/a

0.572

Cell parameters c/b

1.743

Cell parameters α

90°

Cell parameters β

99°..

Cell parameters γ

90°

Z

2

Volume (ų)

761.626

X-Ray Powder Diffraction

15.8(80),
4.57(100),
3.2(30),
2.65(80),
2.48(50),
1.72(50),
1.527(100),
1.31(80)

XRD chart Hectorite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

1.00 - 2.00

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.64 ( ρ calc. Mineralienatlas )

Instability

+++ HCl, + H2O

Preface

Author (Name, Year)

Strese & Hofmann, 1941

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 322

Strese V H, Hofmann U (1941) Synthese von Magnesiumsilikat-Gelen mit zweidimensional regelmäßiger Struktur. Zeitschrift für Anorganische und Allgemeine Chemie 247, 65-94

Varieties

Fe3+-laponite

Ein Fe-haltiger Hectorit - Clays and Clay Minerals 37, 330 (1989)

Laponite

Na-laponite

Ein Na-haltiger Hectorit - Clays and Clay Minerals 26, 279 (1978)

Other languages

German

Hectorit

Spanish

Hectorita

English

Hectorite

French

Hectorite

Russian

Гекторит

Alternative Name

German

Ghassoulit

Spanish

Ghassoulita

Hectorite (of Strese and Hofmann)

CNMNC symbol

Symbol

Htr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) y7GsFIeerUmn90ZXrGaFtQ
GUID (Global unique identifier) 14ACB1CB-9E87-49AD-A7F7-4657AC6685B5
Database ID 1542