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Bismutocolumbite

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Bismutocolumbit
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Bismutocolumbit
schwarzer Bismutocolumbit neben rotem Turmalin auf Albit, Malkhan, Chita, Transbaikalien, Russland; BB ~ 2 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Sibirien, Föderationskreis/Transbaikalien, Region (Zabaykalsky Krai)/Krasnochikoysky, Rajon/Malkhan Pegmatitfeld (Malchansk; Малханского)
Mineral: Bismutocolumbite
Image: 1579898558
License: Usage for Mineralienatlas project only
Bismutocolumbit

schwarzer Bismutocolumbit neben rotem Turmalin auf Albit, Malkhan, Chita, Transbaikalien, Russland; BB 2 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-01-24
Locality: Malkhan Pegmatitfeld (Malchansk; Малханского) / Krasnochikoysky, Rajon / Transbaikalien, Region (Zabaykalsky Krai) / Sibirien, Föderationskreis / Russland

Collectors Summary

Color schwarz
Streak color gelblich braun
Hardness (Mohs) 5.5
Cleavages vollkommen {001}
Fracture muschelig
Crystal System orthorhombisch, Pcnn

Chemism

Chemical formula

Bi(Nb,Ta)O4

Chemical composition

Bismut, Niob, Tantal, Sauerstoff

Unit weight: 387.894866 u; Number of atoms in the formula: 6

Info

Empirical formula:

Bi(Nb0.75Ta0.25)O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

16.50

4

66.67

15.9994300

63.9977200

Niobium

Nb

17.96

0.75

12.50

92.9063820

69.6797865

Tantalum

Ta

11.66

0.25

4.17

180.9479100

45.2369775

Bismuth

Bi

53.88

1

16.67

208.9803820

208.9803820

Analysis wt%

Ta2O5 : 11.67, Nb2O5 : 27.03, Bi2O3 : 59.85 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 92)

Strunz 9th edition incl. updates

4.DE.30

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
E: Mit mittelgroßen [Kationen]; Mit verschiedenen Polyedern
30:Stibiotantalit-Gruppe

Lapis Classification

IV/D.25-035

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)
25: Stibiotantalit-Gruppe

Classification by Hölzel

4.DK.140

4: OXIDES
D: Dioxides
K: Other Niobates, Tantalates
1: Cervantite-Group

Dana 8th edition

08.01.06.04

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4
06: Stibiocolumbite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

gelblich braun

Diaphaneity (Transparency)

teilweise durchscheinend bis opak

max. Birefringence

0.09

Birefringence chart\! Bismutocolumbite title=Birefringence chart Bismutocolumbite

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

2.38

RI value β

2.42

RI value γ / ε

2.47

Ri mean

2.423

2V angle

Biaxial (+) 85°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

52

Space Group

Pcnn

Cell parameters a (Å)

4.992

Cell parameters b (Å)

11.731

Cell parameters c (Å)

5.677

Cell parameters a/b or c/a

0.426

Cell parameters c/b

0.484

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

332.452

X-Ray Powder Diffraction

3.164(100),
2.934(90),
2.842(40),
2.495(40),
1.899(40),
1.871(40),
1.769(40),
1.734(80)

XRD chart Bismutocolumbite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.56

7.749 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

muschelig

Tenacity

spröde

Preface

Author (Name, Year)

Peretyazhko & Zagorskiy & Sapozhnikov & Bobrov & Rakcheev, 1992

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 121 (1992) (3), 130

Other languages

German

Bismutocolumbit

Spanish

Bismutocolumbita

French

Bismutocolumbite

English

Bismutocolumbite

Russian

Висмутоколумбит

Japanese

蒼鉛コルンブ石

CNMNC (IMA)-Number

IMA 1991-003

CNMNC symbol

Symbol

Bclb

Locations with GPS information

IDs

GUSID (Global unique identifier short form) _vNWfC-t10mYGIH-eps8DQ
GUID (Global unique identifier) 7C56F3FE-AD2F-49D7-9818-81FE7A9B3C0D
Database ID 412