Brownleeite Mineral Data
General Brownleeite Information
Chemical Formula:
MnSi
Composition:
Molecular Weight = 83.02 gm
Manganese 66.17 % Mn
Silicon 33.83 % Si
______
100.00 %
Empirical Formula:
Mn0+ Si
Environment:
Fersilicite group
IMA Status:
Proposed IMA 2008 (Dana # Added)
Locality:
Interplanetary dust particle collected from the stratosphere over south-western USA, probably from Comet 26P/Grigg-Skjellerup Link to MinDat.org Location Data.
Name Origin:
Named after Donald E. Brownlee, professor of astronomy at the University of Washington, Seattle
Synonym:
IMA2008-011
Brownleeite Image
Images:
Brownleeite
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.
© NASA
Brownleeite Crystallography
Cell Dimensions:
a = 4.557, Z = 6; V = 94.63 Den(Calc)= 8.74
Crystal System:
Isometric - Tetartoidal H-M Symbol (2 3) Space Group: P 21 3
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
Electron Density:
Bulk Density (Electron Density)=8.21 gm/cc note: Specific Gravity of Brownleeite =8.74 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEBrownleeite = 18.47 barns/electronU=PEBrownleeite x r Electron Density= 151.69 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Brownleeite is Not Radioactive
Brownleeite Classification
Dana Class:
01.01.23.07 (01) Native Elements
(01.01) with metallic elements other than the platinum group
(01.01.23) Suessite Group silicides
01.01.23.01 Suessite (Fe,Ni)3Si I m3m 4/m 3 2/m
01.01.23.02 Gupeiite Fe3Si F m3m 4/m 3 2/m
01.01.23.03 Xifengite Fe5Si3 P 63 /mcm 6/m 2/m 2/m
01.01.23.04 Hapkeite ! Fe2Si P m3m 4/m 3 2/m
01.01.23.05 Luobusaite ! Fe0.83Si2 C mca 2/m 2/m 2/m
01.01.23.06 Mavlyanovite ! Mn5Si3 P 63 /mcm 6/m 2/m 2/m
01.01.23.07 Brownleeite ! MnSi P 21 3 2 3
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 21 3 2 3
Other Brownleeite Information
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
Search for Brownleeite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Brownleeite :
Ask about Brownleeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Brownleeite Specimen Label here :
Brownleeite
MnSi
Dana No: 01.01.23.07 Strunz No: 01.XX.00
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.