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Berezanskite (Berezanskit)

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Berezanskit
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Berezanskit
farblose Aggregate von Berezanskit, Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Berezanskite
Image: 1591297647
License: Usage for Mineralienatlas project only
Berezanskit

farblose Aggregate von Berezanskit, Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-04
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 2.50 - 3.00
Cleavages vollkommen {001}
Fracture uneben
Solubility - H2O, - 1:1 HCl
Crystal System hexagonal, P6/mcc

Chemism

Chemical formula

KLi3Ti2[Si12O30]

Chemical composition

Lithium, Silicium, Titan, Kalium, Sauerstoff

Unit weight: 972.66537 u; Number of atoms in the formula: 48

Info

Empirical formula:

KLi3Ti2[Si12O30]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Lithium

Li

2.14

3

6.25

6.9412000

20.8236000
Oxygen

O

49.35

30

62.50

15.9994300

479.9829000
Silicon

Si

34.65

12

25.00

28.0855300

337.0263600
Potassium

K

4.02

1

2.08

39.0983100

39.0983100
Titanium

Ti

9.84

2

4.17

47.8671000

95.7342000

Analysis wt%

Ø SiO2 : 73.64, TiO2 : 15.86, Nb2O5 : 0.56, Li2O : 4.50, K2O : 4.70 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 97)

Strunz 9th edition incl. updates

9.CM.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
M: ~[Si6O18]12- sechser-Doppelringe
05:Milarit-Gruppe

Lapis Classification

VIII/E.22-125

VIII: SILIKATE
E: Ringsilikate
22: Doppelte Sechserringe [Si12O30] 12-; Milarit/Osumilith-Gruppe

Classification by Hölzel

9.CF.330

9: SILICATES
C: Cyclosilicates
F: ~[Si12O30]12--Rings Milarite-Group

Dana 8th edition

63.02.01a.15

63: Cyclosilicates Cyclosilicate Condensed Rings
02: Cyclosilicates Cyclosilicate Condensed Rings 6-membered rings
01a: Milarite - Osumilite group (Milarite - Osumilite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Osumilite Group

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.005
Birefringence chart\! Berezanskite title=Birefringence chart Berezanskite

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

1.635

RI value γ / ε

1.630

Ri mean

1.633

2V angle

Uniaxial (-)

Optical Data Luminescence

Color SW-UV (254nm)

  

bläulich weiß

Most Common Activator

Ti - O

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

192

Space Group

P6/mcc

Cell parameters a (Å)

9.903

Cell parameters b (Å)

-

Cell parameters c (Å)

14.276

Cell parameters a/b or c/a

1.442

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

1212.469

Kristall structure

F. C. Hawthorne, E. Sokolova, L.A. Pautov, A. A. Agakhanov, V. Yu. Karpenko: Refinement of the crystal structure of berezanskite, Ti2□2KLi3(Si12O30). Mineral Mag. Vol. 80 (2016) S. 733-738.

X-Ray Powder Diffraction

7.15(40),
4.29(50),
4.07(80),
3.57(80),
3.30(10),
3.16(100),
2.895(90),
2.742(30)
XRD chart Berezanskite

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

Physical Properties

Hardness (Mohs)

2.50 - 3.00

VHN (Hardness Vickers)

69 (20g)

Density (g/cm³)

2.66 (gemessen)

2.664 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

uneben

Tenacity

spröde

Instability

- H2O, - 1:1 HCl

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)

Preface

Author (Name, Year)

Pautov & Agakhanov, 1997

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 126 (1997) (4), 75

IMA group assignments

Other languages

German

Berezanskit

Spanish

Berezanskita

English

Berezanskite

French

Berezanskite

Russian

Березанскит

Traditional Chinese

鈦鋰大隅石

Simplified Chinese

钛锂大隅石

CNMNC (IMA)-Number

IMA 1996-041

CNMNC symbol

Symbol

Bzk

Locations with GPS information