Mineralogy Database

Brownleeite Mineral Data

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General Brownleeite Information

Help on Chemical  Formula: Chemical Formula: MnSi
Help on Composition: Composition: Molecular Weight = 83.02 gm
   Manganese  66.17 %  Mn
   Silicon    33.83 %  Si
             100.00 % 
Help on Empirical Formula: Empirical Formula: Mn0+Si
Help on Environment: Environment: Fersilicite group
Help on IMA Status: IMA Status: Proposed IMA 2008 (Dana # Added)
Help on Locality: Locality: Interplanetary dust particle collected from the stratosphere over south-western USA, probably from Comet 26P/Grigg-Skjellerup Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Donald E. Brownlee, professor of astronomy at the University of Washington, Seattle
Help on Synonym: Synonym: IMA2008-011

Brownleeite Image

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Click Here for Larger   Image


Comments: Cubic grain of brownleeite (false colored magenta) in the bottom of a pit as captured by aerogel.
Location: Interplanetary dust particle (IDP) that appears to have originated from comet 26P/Grigg-Skjellerup. Scale: See Image.

Brownleeite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 4.557, Z = 6; V = 94.63 Den(Calc)= 8.74
Help on Crystal System: Crystal System: Isometric - Tetartoidal H-M Symbol (2 3) Space Group: P 213
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.038(1), 1.861(0.5), 1.218(0.24),3.223(0.18), 2.632(0.16), 0.8464(0.15), 0.9946(0.12), 1.374(0.1),

Calculated Properties of Brownleeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.21 gm/cc
note: Specific Gravity of Brownleeite =8.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBrownleeite = 18.47 barns/electron
U=PEBrownleeite x rElectron Density= 151.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brownleeite is Not Radioactive

Brownleeite 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.XX.00 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.X - Unclassified Strunz ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, pho
  01.XX -Silicide
01.XX.00 Tantalum* Ta I m3m 4/m 3 2/m
01.XX.00 Hexamolybdenum! (Mo,Ru,Fe,Ir,Os) P 63/mmc 6/m 2/m 2/m
01.XX.00 Brownleeite! MnSi P 213 2 3

Other Brownleeite Information

Help on See Also: See Also: Links to other databases for Brownleeite :
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.XX.00





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