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Brownleeite

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Silicide mineral
Brownleeite
General
CategoryNative element class, Fersilicite group
Formula
(repeating unit)		MnSi
IMA symbolBwn
Strunz classification1.XX.00
Dana classification01.01.23.07
Crystal systemIsometric
Crystal classTetartoidal (23)
H-M symbol: (23)
Space groupP213
Identification
Crystal habitCubic grain in microscopic dust particle (< 2.5 μm)
References

Brownleeite is a silicide mineral with chemical formula MnSi. It was discovered by researchers of the Johnson Space Center in Houston while analyzing the Pi Puppid particle shower of the comet 26P/Grigg-Skjellerup. The only other known natural manganese silicide is mavlyanovite, Mn5Si3.

Overview

The particles were collected from the stratosphere over south-western US in April 2003 using an ER-2 high-altitude research aircraft of NASA. The team of researchers from US, Germany and Japan was led by NASA scientist Keiko Nakamura-Messenger.

To determine the mineral's origin and examine other dust materials, a new transmission electron microscope was installed in 2005 at Johnson Space Center.

The mineral name was approved by the International Mineralogical Association (IMA Number 2008-011). The NASA scientists named the mineral after Donald E. Brownlee, professor of astronomy at the University of Washington, Seattle, because of his pioneering research on interplanetary dust particles.

See also

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. http://webmineral.com/data/Brownleeite.shtml Webmineral data
  3. http://www.mindat.org/min-36014.html Mindat.org
  4. Mindat, http://www.mindat.org/min-38826.html
  5. "University of Washington News of Juni 12, 2008". Archived from the original on 2008-07-08. Retrieved 2008-06-14.
  6. Newswise: Like a Rock: New Mineral Named for Astronomer Retrieved on June 15, 2008
  7. NASA News Releases June 12, 2008: NASA Finds New Type of Comet Dust Mineral
  8. Minerals approved by the IMA-CNMNC in June 2008
  9. Universe Today June 12, 2008: Alien Mineral From Comet Dust Found in Earth's Atmosphere

External links

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