Mineralogy Database

Sphaerobismoite Mineral Data

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General Sphaerobismoite Information

Help on Chemical  Formula: Chemical Formula: Bi2O3
Help on Composition: Composition: Molecular Weight = 449.96 gm
   Bismuth  92.89 %  Bi  103.56 % Bi2O3
   Oxygen    7.11 %  O
           ______        ______ 
           100.00 %      103.56 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi2O2
Help on Environment: Environment: In the secondary oxidation zone. Dimorphous with bismite.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Neubulach and Wittichen, Black Forest, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the form of the aggregates and the composition.
Help on Name Pronunciation: Name Pronunciation: Sphaerobismoite + Pronunciation Say SPHAEROBISMOITE
Help on Synonym: Synonym: IMA1993-009

Sphaerobismoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.7995
Help on Cell Dimensions: Cell Dimensions: a = 8.08, c = 6.46, Z = 4; V = 421.75 Den(Calc)= 7.09
Help on Crystal System: Crystal System: Tetragonal Space Group: P 42212 or P 41/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 5.73(0.7), 1.902(0.6),

Physical Properties of Sphaerobismoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Green, Yellowish, Gray.
Help on Density: Density: 7.17
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: white

Optical Properties of Sphaerobismoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1629,KPDmeas= 0.1611,KC= 0.1584
Ncalc = 2.12 - 2.14
Help on Optical Data: Optical Data: Uniaxial (+), w=2.13, e=2.18, bire=0.0500.

Calculated Properties of Sphaerobismoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.80 gm/cc
note: Specific Gravity of Sphaerobismoite =7.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000035064
Boson Index = 0.999964936
Help on Photoelectric: Photoelectric: PESphaerobismoite =1,847.85 barns/electron
U=PESphaerobismoite x rElectron Density=10718.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sphaerobismoite is Not Radioactive

Sphaerobismoite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.03)with a cation charge of 3+ (A+++2 O3)
  (04.03.13)Dana Group Sphaerobismoite Bi2O3 P 42212 or P 41/n Tetra Chrombismite! Bi16CrO27 I 4,I 4-,I 4/m Tetra
Help on  Strunz Class: Strunz Class: 04.CB.65 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CB -With medium-sized cations
04.CB.65 Sphaerobismoite Bi2O3 P 42212 or P 41/n Tetra

Other Sphaerobismoite Information

Help on References: References: NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Am.Min.,Vol.81,p1514,1996) OPTIC PROP.(MinRec, Vol. 28, No. 3)
Help on See Also: See Also: Links to other databases for Sphaerobismoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 04.CB.65





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