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Hectorite

Pictures (2 Images total)

Hectorit
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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 / Billom, Kanton / Clermont-Ferrand, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich
Hectorit
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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 / Billom, Kanton / Clermont-Ferrand, Arrondissement / Puy-de-Dôme, Département / Auvergne-Rhône-Alpes, Region / Frankreich

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

Volumne (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

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Saponite

(Ca,Na)0.3(Mg,Fe2+)3(Si,Al)4O10(OH)2·4H2O

9.EC.40

'Hectorite'

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

9.EC.40

Beidellite

(Na,Ca0.5)0.3Al2(Si,Al)4O10(OH)2·4H2O

9.EC.40

Nontronite

Na0.3Fe23+(Si,Al)4O10(OH)2·4H2O

9.EC.40

Kurumsakite

(Zn,Ni,Cu)8Al8V2Si5O35·27H2O

9.EC.40

Swinefordite

(Ca,Na)0.3(Al,Li,Mg)2(Si,Al)4O10(OH,F)2·2H2O

9.EC.40

Volkonskoite

Ca0.3(Cr3+,Mg,Fe3+)2(Si,Al)4O10(OH)2·4H2O

9.EC.40

Yakhontovite

(Ca,Na,K)0.3(CuFe2+Mg)2Si4O10(OH)2·3H2O

9.EC.40

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

9.EC.40

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Hectorite'

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

VIII/H.20-010

Saponite

(Ca,Na)0.3(Mg,Fe2+)3(Si,Al)4O10(OH)2·4H2O

VIII/H.20-020

Ferrosaponite

Ca0.3(Fe2+,Mg,Fe3+)3[(OH)2|(Si,Al)Si3O10]·4H2O

VIII/H.20-027

'Spadaite'

MgSiO2(OH)2·H2O

VIII/H.20-030

'Stevensite'

(Ca|2)0.3Mg3Si4O10(OH)2

VIII/H.20-040

Sauconite

Na0.3Zn3(Si,Al)4O10(OH)2·4H2O

VIII/H.20-050

Zincsilite

Zn3Si4O10(OH)2·4H2O

VIII/H.20-060

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

9.EI.100

'Hectorite'

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

9.EI.120

Swinefordite

(Ca,Na)0.3(Al,Li,Mg)2(Si,Al)4O10(OH,F)2·2H2O

9.EI.130

Wonesite

(Na,K,☐)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4

triklin : 1 : C1

9.EI.160

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)

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

German pages

DeWikiPedia - search for: Hectorit
Google-Bilder-Suche - search for: Hectorit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Hectorit

English pages

Mindat - search for: Hectorite
Webmineral - search for:Hectorite
Handbook-of-Mineralogy - search for: Hectorite
RRUFF - Raman, XRD and other mineral data - search for: Hectorite
RRUFF - References and PDF downloads - search for: Hectorite
American-Mineralogist-Crystal-Structure-Database - search for: Hectorite
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Russian pages

Webmineral.ru - search for: Гекторит

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German pages

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