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Chrombismite

Additional Functions

Collectors Summary

Hardness (Mohs) 3.25
Cleavages no deutlich cleavages were beobachtet
Crystal System tetragonal,

Chemism

Chemical formula

Bi16CrO27

Chemical composition

Bismut, Chrom, Sauerstoff

Unit weight: 3827.666882 u; Number of atoms in the formula: 44

Info

Empirical formula:

Bi16CrO27

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

11.29

27

61.36

15.9994300

431.9846100
Chromium

Cr

1.36

1

2.27

51.9961600

51.9961600
Bismuth

Bi

87.36

16

36.36

208.9803820

3,343.6861120

Analysis wt%

Bi2O3 : 97.39, CrO3 : 2.61 (Ref: berechnet)

Strunz 9th edition incl. updates

4.CC.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
05:Chrombismit

Lapis Classification

IV/C.02-050

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)

Classification by Hölzel

7.FA.400

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
F: Chromates
A: Chromates (-Anions -Water)

Dana 8th edition

04.03.13.02

04: Oxide Minerals
03: Simple Oxides with a cation charge of 3+ (A+++2 O3)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.05
Birefringence chart\! Chrombismite title=Birefringence chart Chrombismite

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

2.50

RI value γ / ε

2.55

Ri mean

2.517

2V angle

Uniaxial (+)

Crystallography

Crystal System

tetragonal

Cell parameters a (Å)

8.649

Cell parameters b (Å)

-

Cell parameters c (Å)

17.24

Cell parameters a/b or c/a

1.993

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

1289.642

X-Ray Powder Diffraction

3.19(100),
2.730(40),
1.980(40),
1.932(20),
1.715(30),
1.655(50),
1.124(20),
1.054(20)
XRD chart Chrombismite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.25

VHN (Hardness Vickers)

113 (100g)

Density (g/cm³)

9.85 (berechnet)

9.856 ( ρ calc. Mineralienatlas )

Cleavages

no deutlich cleavages were beobachtet

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

China/Shaanxi, Provinz/Shangluo/Luonan, Bezirk/Jialu Mine

Preface

Author (Name, Year)

Zhou Xinchun & Yan Jincai & Wang Guanxin & Wang Shizhong & Liu Liang

References

Canadian Mineralogist 35 (1997), 35

Other languages

German

Chrombismit

French

Chrombismite

English

Chrombismite

Spanish

Crombismita

Russian

Хромбисмит

Alternative Name

Spanish

Chrombismita

CNMNC (IMA)-Number

IMA 1995-044

CNMNC symbol

Symbol

Cbis

IDs

GUSID (Global unique identifier short form) FTrkKAQ5KEKssL6yHMTirg
GUID (Global unique identifier) 28E43A15-3904-4228-ACB0-BEB21CC4E2AE
Database ID 744