Mineralogy Database

Bixbyite Mineral Data

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General Bixbyite Information

Help on Chemical  Formula: Chemical Formula: (Mn+++,Fe+++)2O3
Help on Composition: Composition: Molecular Weight = 158.33 gm
   Manganese  52.05 %  Mn   74.78 % Mn2O3
   Iron       17.64 %  Fe   25.22 % Fe2O3
   Oxygen     30.32 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn3+1.5Fe3+0.5O3
Help on Environment: Environment: Pneumatolytic, hydrothermal, and metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1897
Help on Locality: Locality: Siapa and Chhindwara, India. Thomas Range, Utah. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American mineralogist, M. Bixby.
Help on Name Pronunciation: Name Pronunciation: Bixbyite Say BIXBYITE
 

Bixbyite Image

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  Bixbyite

Comments: Cubic crystals of bixbyite reaching 5 mm sit on a crude pseudomorph of hematite after garnet.
Location: Thomas Range, Juab Co., Utah, USA. Scale: 1.5 x 1.6 cm.
© Isaias Casanova / IC Minerals

Bixbyite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 9.365, Z = 16; V = 821.34 Den(Calc)= 5.12
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: I a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.72(1), 1.657(0.9), 1.421(0.8),
Help on Forms: Forms:

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Help on Above

Forms: ( 1 1 2) ( 1 0 0)

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Physical Properties of Bixbyite

Help on Cleavage: Cleavage: {111} Imperfect, {111} Imperfect, {111} Imperfect
Help on Color: Color: Black.
Help on Density: Density: 4.95
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Bixbyite

Help on Optical Data: Optical Data: NCalc= 2.56 - from Gladstone-Dale relationship (KC = 0.3045) where Ncalc=Dcalc*KC+1
NCalc= 2.51 - from Gladstone-Dale relationship (KC = 0.3045) where Ncalc=Dmeas*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Bixbyite in Air
λ R  ∑ R(λ) 
 400 nm   24.70   
 420 nm   24.10 
 440 nm   23.50 
 460 nm   23.00 
 480 nm   22.80 
 500 nm   22.90 
 520 nm   23.20 
 540 nm   23.60 
 560 nm   23.50 
 580 nm   23.20 
 600 nm   22.90 
 620 nm   22.70 
 640 nm   22.40 
 660 nm   22.20 
 680 nm   22.20 
 700 nm   22.10 
Calculated Relative Intensity Colors of Bixbyite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 390%
R                        
 

Calculated Properties of Bixbyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.82 gm/cc
note: Specific Gravity of Bixbyite =5.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0038844318
Boson Index = 0.9961155682
Help on Photoelectric: Photoelectric: PEBixbyite = 19.12 barns/electron
U=PEBixbyite x rElectron Density= 92.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bixbyite is Not Radioactive
 

Bixbyite Classification

Help on  Dana Class: Dana Class: 04.03.07.02 (04)Simple Oxides
  (04.03)with a cation charge of 3+ (A+++2 O3)
  (04.03.07)Dana Group
 
04.03.07.01 Maghemite gamma-Fe2O3 P 213 2 3
 
04.03.07.02 Bixbyite (Mn,Fe)2O3 I a3 2/m 3
Help on  Strunz Class: Strunz Class: 04.CB.10 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.10 Bixbyite (Mn,Fe)2O3 I a3 2/m 3
 
04.CB.10 Avicennite Tl2O3 I a3 2/m 3
 

Other Bixbyite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Bixbyite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST
20 - theimage

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

Bixbyite

(Mn+++,Fe+++)2O3
Dana No: 04.03.07.02 Strunz No: 04.CB.10
Locality:

 

Notes:

 

 
   
 


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