Bismite Mineral Data

Bismite Mineral Data +

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General Bismite Information

Chemical Formula:

Bi2O3

Composition:

Molecular Weight = 465.96 gm

Bismuth 89.70 % Bi 100.00 % Bi₂O₃

Oxygen 10.30 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi₂O₃

Environment:

Oxidation product of various bismuth minerals.

IMA Status:

Valid Species (Pre-IMA) 1868

Locality:

Goldfield, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named after its composition of Bi.

Synonym:

ICSD 15072

PDF 41-1449

Bismite Image

Images:

Bismite

Comments: Tan, massive bismite with quartz.
Location: Schneeberg, Sachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Bismite Waylandite

Comments: Gray massive stream rounded waylandite with tan bismite crusts.
Location: Mumba, Nord-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismite Crystallography

Axial Ratios:

a:b:c =0.7162:1:0.9189

Cell Dimensions:

a = 5.83, b = 8.14, c = 7.48, Z = 4; beta = 67.066° V = 326.91 Den(Calc)= 9.47

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.253(1), 2.693(0.4), 2.708(0.4),

Physical Properties of Bismite

Cleavage:

None

Color:

Green yellow, Gray green, Yellow.

Density:

8.5 - 9.5, Average = 9

Diaphaniety:

Transparent to translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Pulverulent - Forms a loose, poorly-coherent powdery mass.

Habit:

Scaly - Morphology like fish scales.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Adamantine

Streak:

light yellow

Optical Properties of Bismite

Gladstone-Dale:

CI meas= 0.339 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.372 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.0961,KPDmeas= 0.1011,KC= 0.153

Optical Data:

Uniaxial (-), e=1.82, w=2, bire=0.1800.

Calculated Properties of Bismite

Electron Density:

r_electron=7.34 gm/cc
note: r_Bismite=9.00 gm/cc.

Fermion Index

Fermion Index = 0.00005
Boson Index = 0.99995

Photoelectric:

PE_Bismite=1,770.07 barns/electron
U=PE_Bismite x r_electron=12991.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bismite is Not Radioactive

Bismite Classification

Dana Class:

4.3.10.2 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.10)Dana Group

4.3.10.1 Claudetite As2O3 P 2₁/n 2/m

4.3.10.2 Bismite Bi2O3 P 2₁/c 2/m

Strunz Class:

IV/C.02-30 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.02 - Arsenolite - Sillenite series

IV/C.02-10 Arsenolite As2O3 F d3m 4/m 3 2/m

IV/C.02-20 Senarmontite Sb2O3 F d3m 4/m 3 2/m

IV/C.02-30 Bismite Bi2O3 P 2₁/c 2/m

IV/C.02-35 Sphaerobismoite Bi2O3 P 4₂212 or P 4₁/n Tetra

IV/C.02-40 Sillenite Bi12SiO20 I 23 2 3

IV/C.02-50 Chrombismite! Bi16CrO27 I 4,I 4-,I 4/m Tetra

Other Bismite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Bismite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Bismite Specimen Label here :

Bismite

Bi2O3
Dana No: 4.3.10.2 Strunz No: IV/C.02-30
Locality:

Notes: