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Sokolovaite

Pictures (1 Images total)

Sokolovait
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1591124628
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Sokolovait
eingebettetes weiß/farbloses Aggregat von Sokolovait (mit wenig Quarz am linken Rand, nahezu nicht erkennbar), Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB ~ 2,5 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Sokolovaite
Image: 1591124628
License: Usage for Mineralienatlas project only
Sokolovait

eingebettetes weiß/farbloses Aggregat von Sokolovait (mit wenig Quarz am linken Rand, nahezu nicht erkennbar), Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB 2,5 cm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-02
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan

Collectors Summary

Hardness (Mohs) 3.75
Cleavages vollkommen (001)
Crystal System monoklin,

Chemism

Chemical formula

CsLi2AlSi4O10F2

Additional chem. information

Glimmer-Gruppe

Chemical composition

Aluminium, Cäsium, Lithium, Silicium, Fluor, Sauerstoff

Unit weight: 484.1026167 u; Number of atoms in the formula: 20

Info

Empirical formula:

CsLi2AlSi4O10F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Lithium

Li

2.87

2

10.00

6.9412000

13.8824000

Oxygen

O

33.05

10

50.00

15.9994300

159.9943000

Fluorine

F

7.85

2

10.00

18.9984033

37.9968065

Aluminium

Al

5.57

1

5.00

26.9815382

26.9815382

Silicon

Si

23.21

4

20.00

28.0855300

112.3421200

Caesium

Cs

27.45

1

5.00

132.9054520

132.9054520

Analysis wt%

SiO2 : 49.97, Al2O3 : 10.44, Li2O : 6.09, Cs2O : 27.60, F : 7.92 (Ref: New Data on Minerals, (Monatshefte) 2006)

Strunz 9th edition incl. updates

9.EC.20

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

Lapis Classification

VIII/H.11-015

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

Classification by Hölzel

9.ED.290

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

Dana 8th edition

71.02.02b.08b

71: Phyllosilicate Minerals
02: Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 2:1 Layers
02b: Mica Group (Biotite subgroup)

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Mica group  ⇒ True micas

Optical Properties

max. Birefringence

0.013

Birefringence chart\! Sokolovaite title=Birefringence chart Sokolovaite

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

1.554

RI value β

1.566

RI value γ / ε

1.567

Ri mean

1.562

2V angle

Biaxial (-) 32°

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.182

Cell parameters b (Å)

9.005

Cell parameters c (Å)

10.692

Cell parameters a/b or c/a

0.575

Cell parameters c/b

1.187

Cell parameters α

90°

Cell parameters β

99.82

Cell parameters γ

90°

Z

2

Volumne (ų)

491.62

X-Ray Powder Diffraction

3.897(49), 3.682(80), 3.418(65), 3.174(100), 2.980(41), 2.634(79), 2.582(66), 2.107(94)

XRD chart Sokolovaite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.75

VHN (Hardness Vickers)

154 (10g)

Density (g/cm³)

3.25

3.27 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (001)

References

Commission on New Minerals, Nomenclature and Classification Publication pending

IMA group assignments

Other languages

German

Sokolovait

English

Sokolovaite

Russian

Соколоваит

CNMNC (IMA)-Number

IMA 2004-012

CNMNC symbol

Symbol

Sok

Locations with GPS information