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Maleevite

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Maleevit
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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 2020-06-04
Locality: Dara-i-Pioz (Darai-Pioz; Dara-i-Pech) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij; Region of Republican Subordination) / 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

Volumne (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

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij; Region of Republican Subordination)/Dara-i-Pioz (Darai-Pioz; Dara-i-Pech)

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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

 DeWikiPedia - search for: Maleevit
Google-Bilder-Suche - search for: Maleevit
Mineralienatlas.de (Forum) - search for: Maleevit

English pages

 Mindat - search for: Maleevite
Webmineral - search for:Maleevite
Handbook-of-Mineralogy - search for: Maleevite
RRUFF - Raman, XRD and other mineral data - search for: Maleevite
RRUFF - References and PDF downloads - search for: Maleevite
American-Mineralogist-Crystal-Structure-Database - search for: Maleevite
Strahlen.org - search for: Maleevite

Russian pages

 Webmineral.ru - search for: Малеевит

Mineral Dealer

German pages

 hausen - Mineralgroßhandel - search for: Maleevit
Crystal-Treasure.com - search for: Maleevit
Bosse - search for: Maleevit
Edelsteine Neuburg - Gundolf Fischer - search for: Maleevit

Locations with GPS information