Mineralogy Database

Luobusaite Mineral Data

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General Luobusaite Information

Help on Chemical  Formula: Chemical Formula: Fe0.83Si2
Help on Composition: Composition: Molecular Weight = 102.52 gm
   Iron     45.21 %  Fe
   Silicon  54.79 %  Si
           100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+0.83Si2
Help on Environment: Environment: Recovered from a crushed and sieved fraction from a podiform chromitite in ophiolite.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Luobusa mine, Indus-Yarlung Zangbo suture zone, Qusong County, Tibet Autonomous Region, People�s Republic of China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2005-052a

Luobusaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2684:1:1.0057
Help on Cell Dimensions: Cell Dimensions: a = 9.874, b = 7.784, c = 7.829, Z = 16; V = 601.73 Den(Calc)= 4.53
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.844(1), 3.06(0.8), 1.889(0.6),1.865(0.4), 1.977(0.4), 2.402(0.25), 2.849(0.2), 1.75(0.15),

Physical Properties of Luobusaite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 7 - Quartz
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Luobusaite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Luobusaite in Air
λ R  ∑ R(λ) 
 400 nm   49.63   
 470 nm   44.41 
 540 nm   46.46 
 580 nm   49.71 
 650 nm   46.89 
 700 nm   47.74 
Calculated Relative Intensity Colors of Luobusaite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%

Calculated Properties of Luobusaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.38 gm/cc
note: Specific Gravity of Luobusaite =4.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PELuobusaite = 15.40 barns/electron
U=PELuobusaite x rElectron Density= 67.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Luobusaite is Not Radioactive

Luobusaite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.01)with metallic elements other than the platinum group
  (01.01.23)Suessite Group silicides Suessite (Fe,Ni)3Si I m3m 4/m 3 2/m Gupeiite Fe3Si F m3m 4/m 3 2/m Xifengite Fe5Si3 P 63/mcm 6/m 2/m 2/m Hapkeite! Fe2Si P m3m 4/m 3 2/m Luobusaite! Fe0.83Si2 C mca 2/m 2/m 2/m Mavlyanovite! Mn5Si3 P 63/mcm 6/m 2/m 2/m Brownleeite! MnSi P 213 2 3
Help on  Strunz Class: Strunz Class: 01.BB.25 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.B - Metallic Carbides, Silicides, Nitrides and Phosphides
  01.BB -Silicides
01.BB.25 Luobusaite! Fe0.83Si2 C mca 2/m 2/m 2/m

Other Luobusaite Information

Help on References: References: NAME( AmMin, v92:1540) PHYS. PROP.(AmMin, v92:1540) OPTIC PROP.(AmMin, v92:1540)
Help on See Also: See Also: Links to other databases for Luobusaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 01.BB.25





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