Mineralogy Database

Bismutite Mineral Data

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General Bismutite Information

Help on Chemical  Formula: Chemical Formula: Bi2(CO3)O2
Help on Composition: Composition: Molecular Weight = 509.97 gm
   Bismuth  81.96 %  Bi   91.37 % Bi2O3
   Carbon    2.36 %  C     8.63 % CO2
   Oxygen   15.69 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi2(CO3)O2
Help on Environment: Environment: Alteration product of bismuthinite and native bismuth.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Schneeberg District, Erzgebirge, Saxony, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the bismuth in the composition.
Help on Name Pronunciation: Name Pronunciation: Bismutite + Pronunciation Say BISMUTITE
Help on Synonym: Synonym: Bismutosparite

Bismutite Image

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Comments: White to green earthy crust of bismutite.
Location: La Higuera, Coquimbo, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismutite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0007:1:3.5409
Help on Cell Dimensions: Cell Dimensions: a = 3.865, b = 3.862, c = 13.675, Z = 2; V = 204.12 Den(Calc)= 8.30
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Imm2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.62(1), 2.14(1), 2.95(1),

Physical Properties of Bismutite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Brown, Brownish yellow, Green, Gray, Yellow.
Help on Density: Density: 7
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: gray

Optical Properties of Bismutite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.098 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1426,KPDmeas= 0.169,KC= 0.158
Ncalc = 2.11 - 2.31
Help on Optical Data: Optical Data: Biaxial (?), a=2.12-2.15, b=2.12-2.15, g=2.28, bire=0.1300-0.1600

Calculated Properties of Bismutite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.82 gm/cc
note: Specific Gravity of Bismutite =7.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003351921
Boson Index = 0.9996648079
Help on Photoelectric: Photoelectric: PEBismutite =1,586.42 barns/electron
U=PEBismutite x rElectron Density=9,232.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bismutite is Not Radioactive

Bismutite Classification

Help on  Dana Class: Dana Class: 16a.03.05.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.05)Dana Group
16a.03.05.01 Bismutite Bi2(CO3)O2 Imm2 mm2
Help on  Strunz Class: Strunz Class: 05.BE.25 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BE -With Pb, Bi
05.BE.25 Bismutite Bi2(CO3)O2 Imm2 mm2

Other Bismutite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(AmMin, Vol 88, p 478) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Bismutite :
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: 16a.03.05.01 Strunz No: 05.BE.25





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