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Revdite (Revdit)

Pictures (1 Images total)

Revdit
Views (File:
1581773175
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Revdit
weiße, flockige Aggregate von Revdit, neben rotbraunem Villiaumit, Kedykverpakhk Mountain, Lovozero, Kola, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Kedykverpakhk, Berg
Mineral: Revdite
Image: 1581773175
License: Usage for Mineralienatlas project only
Revdit

weiße, flockige Aggregate von Revdit, neben rotbraunem Villiaumit, Kedykverpakhk Mountain, Lovozero, Kola, Russland; BB < 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-15
Locality: Kedykverpakhk, Berg / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos, weiß
Streak color weiß
Lustre Glasglanz, Perlglanz
Hardness (Mohs) 2
Cleavages vollkommen {001}, weniger vollkomen {010}
Solubility +++ Säuren, löst sich langsam in H2O bei Raumtemperatur
Crystal System monoklin, C2

Chemism

Chemical formula

Na16Si16O27(OH)26·28H2O

Chemical composition

Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 2195.8102872 u; Number of atoms in the formula: 195

Info

Empirical formula:

Na16Si16O27(OH)26·28H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.76

82

42.05

1.0079470

82.6516540

Oxygen

O

59.02

81

41.54

15.9994300

1,295.9538300

Sodium

Na

16.75

16

8.21

22.9897702

367.8363232

Silicon

Si

20.46

16

8.21

28.0855300

449.3684800

Analysis wt%

SiO2 : 45.21, Na2O : 22.25, H2O : 32.50 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 80)

Strunz 9th edition incl. updates

9.DM.30

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
M: Ketten- und Bandsilikate mit 6-periodischen Einfachketten
30:Revdit-Gruppe

Lapis Classification

VIII/H.05-040

VIII: SILIKATE
H: Schichtsilikate
5: tetragonale oder pseudotetragonale Schichtstrukturen [Si4O10] 4- u.a.

Classification by Hölzel

9.EA.440

9: SILICATES
E: Phyllosilicates
A: tetragonal & pseudotetragonal Phyllosilicates
4: Natrosilite-Group

Dana 8th edition

74.03.06.01

74: Phyllosilicates Phyllosilicate Modulated Layers
03: Phyllosilicates Phyllosilicate Modulated Layers with joined strips

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz, Perlglanz

max. Birefringence

0.021

Birefringence chart\! Revdite title=Birefringence chart Revdite

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

1.469

RI value β

1.482

RI value γ / ε

1.490

Ri mean

1.480

2V angle

Biaxial (-) 75° (gemessen)

Orientation

YZ nahezu parallel zu (100); Y ^ c = 0° zu 10°

Optical Data Luminescence

Color LW-UV (365nm)

 

blau

LW-UV Intensity

schwach

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

5

Space Group

C2

Cell parameters a (Å)

53.83

Cell parameters b (Å)

9.972

Cell parameters c (Å)

6.907

Cell parameters a/b or c/a

5.398

Cell parameters c/b

0.693

Cell parameters α

90.0

Cell parameters β

97.28

Cell parameters γ

100.48

Z

2

Volumne (ų)

3677.739

X-Ray Powder Diffraction

13.37(80),
4.46(100),
3.79(40),
3.34(70),
3.12(20),
2.879(40),
2.501(50),
2.230(20)

XRD chart Revdite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.94 (gemessen) 1.93 (berechnet)

1.983 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}, weniger vollkomen {010}

Tenacity

Fasern sind flexibal

Instability

+++ Säuren, löst sich langsam in H2O bei Raumtemperatur

Chemical Properties and Tests

gibt alkaline Reaktion

Preface

Author (Name, Year)

Khomyakov & Cherepivskaya & Kurova & Vlasyuk, 1980

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 109 (1980), 566

Kristallografiya 37 (1992), 1177

Other languages

German

Revdit

Spanish

Revdita

English

Revdite

French

Revdite

Russian

Ревдит

CNMNC (IMA)-Number

IMA 1979-082

CNMNC symbol

Symbol

Rev

Locations with GPS information