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Maleevite

Pictures (1 Images total)

Maleevit
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1591297223
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Maleevit
glasiges Aggregat von Maleevit, Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB < 2 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Maleevite
Image: 1591297223
License: Usage for Mineralienatlas project only
Maleevit

glasiges Aggregat von Maleevit, Dara-i-Pioz Gletscher, Tien Shan, Tadschikistan; BB < 2 mm, analysiert

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
Lustre Glasglanz
Hardness (Mohs) 6.5
Cleavages keine
Fracture uneben
Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

BaB2Si2O8

Additional chem. information

Das Barium Analog von Danburit und Pekovit.

Chemical composition

Barium, Silicium, Bor, Sauerstoff

Unit weight: 343.1176 u; Number of atoms in the formula: 13

Info

Empirical formula:

BaB2Si2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Boron

B

6.30

2

15.38

10.8117000

21.6234000

Oxygen

O

37.30

8

61.54

15.9994300

127.9954400

Silicon

Si

16.37

2

15.38

28.0855300

56.1710600

Barium

Ba

40.02

1

7.69

137.3277000

137.3277000

Analysis wt%

SiO2 : 35.68, B2O3 : 20.67, PbO : 1.14, BaO : 43.15 (Ref: Canadian Mineralogist 2004)

Strunz 9th edition incl. updates

9.FA.65

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
65:Danburit-Gruppe

Lapis Classification

VIII/J.08-040

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
8: Ohne tetraederfremde Anionen

Classification by Hölzel

9.FD.380

9: SILICATES
F: Tektosilicates
D: Plagioclase-Group

Dana 8th edition

56.03.01.02

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
03: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with [Si2O7] with borate groups
01: Danburite Goup

IMA status

anerkannt 2002

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.007

Birefringence chart\! Maleevite title=Birefringence chart Maleevite

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

1.649

RI value β

1.656

RI value γ / ε

1.656

Ri mean

1.654

2V angle

Biaxial (-) 5° (gemessen)

Optical Data Luminescence

Color SW-UV (254nm)

 

blau

SW-UV Intensity

stark

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

8.141

Cell parameters b (Å)

8.176

Cell parameters c (Å)

9.038

Cell parameters a/b or c/a

0.996

Cell parameters c/b

1.105

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

601.577

X-Ray Powder Diffraction

3.62(1), 2.021(0.7), 3.39(0.6), 6.07(0.6), 2.83(0.5), 2.481(0.4), 4.86(0.3)

XRD chart Maleevite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.5

VHN (Hardness Vickers)

1018 (50g)

Density (g/cm³)

3.78 (gemessen) 3.79 (berechnet)

3.788 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

Preface

Name from

Bulgarischem Mineralogen Mikhail Naidenovitch Maleev (geboren 1940), ein bekannter Experte der Morphologie von Kristallen und Mineral Systematik

Author (Name, Year)

Pautov, Agakhanov, Sokolova, Hawthorne (2004)

References

Canadian Mineralogist 42 (2004), 107

American Mineralogist 90 (2005), 272

Other languages

German

Maleevit

English

Maleevite

Russian

Малеевит

Traditional Chinese

矽鋇硼石

Simplified Chinese

硅钡硼石

CNMNC (IMA)-Number

IMA 2002-027

CNMNC symbol

Symbol

Mle

Locations with GPS information

IDs

GUSID (Global unique identifier short form) VlKXa4DiBU-YeyzW4vmQow
GUID (Global unique identifier) 6B975256-E280-4F05-987B-2CD6E2F990A3
Database ID 6795