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Rectorite

Pictures (2 Images total)

Rectorit
Views (Image: 1459166469): 605
Rectorit (SNr: B000107)

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 / Haut-Grésivaudan, Kanton / Grenoble, Arrondissement / Isère, Département / Auvergne-Rhône-Alpes, Region / Frankreich
Rectorit
Views (Image: 1554565303): 243
Rectorit

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

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2019-04-06
Locality: Allevard / Haut-Grésivaudan, Kanton / Grenoble, Arrondissement / Isère, Département / Auvergne-Rhône-Alpes, Region / Frankreich

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

Volumne (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

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

Dozyite

Mg7(Al,Fe3+,Cr)2[(OH)12|Al2Si4O15]

monoklin : m : Cm

9.EC.60

Kulkeite

Na0.35Mg8Al(AlSi7)O20(OH)10

9.EC.60

Tosudite

Na0.5(Al,Mg)6(Si,Al)8O18(OH)12·5H2O

9.EC.60

Aliettite

Ca0.2Mg6(Si,Al)8O20(OH)4·4H2O

9.EC.60

Rectorite

(Na,Ca)Al4(Si,Al)8O20(OH)4·2H2O

9.EC.60

Saliotite

Na0.5Li0.5Al3[(OH)5|AlSi3O10]

monoklin : 2/m : C2/m

9.EC.60

Corrensite

(Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·nH2O

9.EC.60

'Karpinskite'

(Mg,Ni)2Si2O5(OH)2

9.EC.60

Hydrobiotite

K(Mg,Fe2+)6(Si,Al)8O20(OH)4·nH2O

monoklin : 2/m : C2/m

9.EC.60

Cortesognoite

CaV2Si2O7(OH)2·H2O

orthorhombisch : mmm : Cmcm

9.EC.60

Lunijianlaite

Li0.7Al6.2(Si7AlO20)(OH,O)10

9.EC.60

Brinrobertsite

(Na,K,Ca)0.3(Al,Fe,Mg)4(Si,Al)8O20(OH)4·3.5H2O

9.EC.60

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

Lunijianlaite

Li0.7Al6.2(Si7AlO20)(OH,O)10

VIII/H.18-005

Saliotite

Na0.5Li0.5Al3[(OH)5|AlSi3O10]

monoklin : 2/m : C2/m

VIII/H.18-007

Kulkeite

Na0.35Mg8Al(AlSi7)O20(OH)10

VIII/H.18-010

Aliettite

Ca0.2Mg6(Si,Al)8O20(OH)4·4H2O

VIII/H.18-020

Rectorite

(Na,Ca)Al4(Si,Al)8O20(OH)4·2H2O

VIII/H.18-030

'Tarasovite'

(Na,K,H3O,Ca)2Al4[(OH)2|(Si,Al)4O10]2·H2O

VIII/H.18-040

Tosudite

Na0.5(Al,Mg)6(Si,Al)8O18(OH)12·5H2O

VIII/H.18-050

Corrensite

(Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·nH2O

VIII/H.18-060

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

Lunijianlaite

Li0.7Al6.2(Si7AlO20)(OH,O)10

9.EH.100

Dozyite

Mg7(Al,Fe3+,Cr)2[(OH)12|Al2Si4O15]

monoklin : m : Cm

9.EH.110

Kulkeite

Na0.35Mg8Al(AlSi7)O20(OH)10

9.EH.130

Rectorite

(Na,Ca)Al4(Si,Al)8O20(OH)4·2H2O

9.EH.140

Saliotite

Na0.5Li0.5Al3[(OH)5|AlSi3O10]

monoklin : 2/m : C2/m

9.EH.150

Aliettite

Ca0.2Mg6(Si,Al)8O20(OH)4·4H2O

9.EH.170

Tosudite

Na0.5(Al,Mg)6(Si,Al)8O18(OH)12·5H2O

9.EH.180

Other languages

German

Rectorit

Spanish

Rectorita

English

Rectorite

French

Rectorite

Russian

Ректорит

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

German pages

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

English pages

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

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German pages

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Locations with GPS information