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 2₁3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Brownleeite= 18.47 barns/electron
U=PE_Brownleeite x rElectron 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 2₁3 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 2₁3 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

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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:

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