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Rectorite

Pictures (2 Images total)

Rectorit
Views (File:
1459166469
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Rectorit
von Allevard, Bourg d'Oisans, Grenoble, Isère, Rhône-Alpes, Frankreich; Rectorit, beigefarben, filzig-lederig; BB = 40 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: B000107, Donator: anatase2
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Isère, Département/Grenoble, Arrondissement/Allevard
Mineral: Rectorite
Image: 1459166469
License: Usage for Mineralienatlas project only
Rectorit (SNr: B000107)  D

von Allevard, Bourg d'Oisans, Grenoble, Isère, Rhône-Alpes, Frankreich; Rectorit, beigefarben, filzig-lederig; BB = 40 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2016-03-28
Locality: Allevard / Grenoble, Arrondissement / Isère, Département / Auvergne-Rhône-Alpes, Region / Frankreich
Rectorit
Views (File:
1554565303
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Rectorit
Rectorit; Allevard,Grenoble,Frankreich; BB: 3 cm
Copyright: Rockhounder; Contribution: Rockhounder
Collection: Rockhounder
Location: Frankreich/Auvergne-Rhône-Alpes, Region/Isère, Département/Grenoble, Arrondissement/Allevard
Mineral: Rectorite
Image: 1554565303
License: Usage for Mineralienatlas project only
Rectorit

Rectorit; Allevard,Grenoble,Frankreich; BB: 3 cm

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2019-04-06
Locality: Allevard / Grenoble, Arrondissement / Isère, 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
Crystal System monoklin,

Additional information / Summary

Rectorit ist eine regelmäßige Wechsellagerung ("a 1:1 regular interstratification") aus Montmorillonit und Paragonit - daher als eigenes Mineral anerkannt

Chemism

Chemical formula

(Na,Ca)Al4(Si,Al)8O20(OH)4·2H2O

Chemical composition

Aluminium, Calcium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 781.71309285 u; Number of atoms in the formula: 47

Info

Empirical formula:

(Na0.75Ca0.25)Al4(Si0.75Al0.25)8O20(OH)4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.03

8

17.02

1.0079470

8.0635760

Oxygen

O

53.21

26

55.32

15.9994300

415.9851800

Sodium

Na

2.21

0.75

1.60

22.9897702

17.2423277

Aluminium

Al

20.71

6

12.77

26.9815382

161.8892292

Silicon

Si

21.56

6

12.77

28.0855300

168.5131800

Calcium

Ca

1.28

0.25

0.53

40.0784000

10.0196000

Analysis wt%

SiO2 : 54.02, Al2O3 : 32.74, Na2O : 3.98, H2O : 9.26 (Ref: berechnet)

Strunz 9th edition incl. updates

9.EC.60

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

Lapis Classification

VIII/H.18-030

VIII: SILIKATE
H: Schichtsilikate
18: Tonminerale, regulär geschichtet; Montmorillonit-Gruppe

Classification by Hölzel

9.EH.140

9: SILICATES
E: Phyllosilicates
H: Interstratificated Micas
1: Monoclinic Rectorite-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

2V angle

Biaxial

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.13

Cell parameters b (Å)

8.88

Cell parameters c (Å)

23.85

Cell parameters a/b or c/a

0.578

Cell parameters c/b

2.686

Cell parameters α

90°

Cell parameters β

96.30

Cell parameters γ

90°

Z

2

Volume (ų)

1079.911

X-Ray Powder Diffraction

23.8(100),
11.9(60),
4.75(10),
3.40(20),
2.971(20),
1.970(10)

XRD chart Rectorite

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

Physical Properties

Hardness (Mohs)

1.00 - 2.00

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.33 (berechnet)

2.404 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Brackett & Williams, 1891

References

Dana's New Mineralogy, (Gaines et. al.), 8th edition, (1997), 1515

Other languages

German

Rectorit

Spanish

Rectorita

English

Rectorite

French

Rectorite

Russian

Ректорит

CNMNC symbol

Symbol

Rec

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ykW51V0FFkukk1UPfmENGg
GUID (Global unique identifier) D5B945CA-055D-4B16-A493-550F7E610D1A
Database ID 3229