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Brownleeite

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Formula:
MnSi
System:Isometric
Name:Named for University of Washington astronomer Donald Brownlee, who founded the field of IDP research.


The mineral was discovered within an interplanetary dust particle (or IDP) that is believed to have originated from comet 26P/Grigg-Skjellerup. Type material is in particles less than 1/10,000 of an inch across (or < 0.0025mm).

Classification of Brownleeite

IMA status:Approved 2008
mindat.org URL:http://www.mindat.org/min-36014.html
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Type Occurrence of Brownleeite

Type Locality:Comet 26P/Grigg-Skjellerup, Outer Space
Geological Setting of type material:A particle of cosmic dust collected by a high-altitude research aircraft.

Crystallography of Brownleeite

Crystal System:Isometric
Class (H-M):2 3 - Tetartoidal
Space Group:P21 3
Cell Parameters:a = 4.557Å
Unit Cell Volume:V 94.63 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
3.223 (18)
2.632 (16)
2.038 (100)
1.861 (50)
1.374 (10)
1.218 (24)
0.9946 (12)
0.8464 (15)

Chemical Properties of Brownleeite

Formula:
MnSi
Essential elements:Mn, Si
All elements listed in formula:Mn, Si

Other Names for Brownleeite

Synonyms:
IMA2008-011
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Brownleeite

Reference List:

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Internet Links for Brownleeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Brownleeite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Outer Space
     
    http://www.nasa.gov/home/hqnews/2008/jun/HQ_08143_comet_dust.html
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