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Voloshinite

Additional Functions

Collectors Summary

Cleavages vollkommen (001)
Crystal System monoklin, C2/c

Chemism

Chemical formula

Rb(LiAl1.50.5)(Al0.5Si3.5)O10F2

Additional chem. information

Glimmer-Gruppe

Chemical composition

Aluminium, Lithium, Rubidium, Silicium, Fluor, Sauerstoff, Vakanz

Unit weight: 442.662567905 u; Number of atoms in the formula: 20

Info

Empirical formula:

Rb(LiAl1.5Vc0.5)(Al0.5Si3.5)O10F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

0.5

2.50

0.0000000

0.0000000

Lithium

Li

1.57

1

5.00

6.9412000

6.9412000

Oxygen

O

36.14

10

50.00

15.9994300

159.9943000

Fluorine

F

8.58

2

10.00

18.9984033

37.9968065

Aluminium

Al

12.19

2

10.00

26.9815382

53.9630764

Silicon

Si

22.21

3.5

17.50

28.0855300

98.2993550

Rubidium

Rb

19.31

1

5.00

85.4678300

85.4678300

Analysis wt%

SiO2 : 53.14, Al2O3 : 21.33, K2O : 3.70, Li2O : 4.00, Rb2O : 12.18, Cs2O : 2.02, F : 6.41 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2009)

Strunz 9th edition incl. updates

9.EC.15

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

Lapis Classification

VIII/H.11-055

VIII: SILIKATE
H: Schichtsilikate
11: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Lithionit/Biotit-Reihe

Classification by Hölzel

9.EC.255

9: SILICATES
E: Phyllosilicates
C: Micas-Group

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.079

Birefringence chart\! Voloshinite title=Birefringence chart Voloshinite

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

1.511

RI value β

1.586

RI value γ / ε

1.590

Ri mean

1.562

2V angle

Biaxial (-) 25°

Crystallography

Crystal System

monoklin

Space Group

C2/c

Cell parameters a (Å)

5.191

Cell parameters b (Å)

9.025

Cell parameters c (Å)

20.40

Cell parameters a/b or c/a

0.575

Cell parameters c/b

2.260

Cell parameters α

90°

Cell parameters β

95.37

Cell parameters γ

90°

Z

4

Volume (ų)

951.52

X-Ray Powder Diffraction

10.1(60), 5.08(40), 4.55(80), 3.98(40), 3.49(50), 3.35(60), 2.575(100), 2.017(50)

XRD chart Voloshinite

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

Physical Properties

Density (g/cm³)

2.95 (berechnet)

3.09 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (001)

Tenacity

flexibel

Preface

Author (Name, Year)

Igor V. Pekov, 2007

References

Neue Mineralien - IMA WEB Seite Feb. 2008

Other languages

German

Voloshinit

Spanish

Voloshinita

English

Voloshinite

Russian

Волошинит

CNMNC (IMA)-Number

IMA 2007-052

CNMNC symbol

Symbol

Vls

IDs

GUSID (Global unique identifier short form) v2fl4siZ2EGz3j8wEhfUog
GUID (Global unique identifier) E2E567BF-99C8-41D8-B3DE-3F301217D4A2
Database ID 4866