By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Silicic Acid. According to news reporting from Greenbelt, Maryland, by NewsRx journalists, research stated, "This thermal annealing experiment at 1000K for up to 167h used a physical mixture of vapor phase-condensed magnesiosilica grains and metallic iron nanograins to test the hypothesis that a mixture of magnesiosilica grains and an Fe-source would lead to the formation of ferromagnesiosilica grains. This exploratory study found that coagulation and thermal annealing of amorphous magnesiosilica and metallic grains yielded ferromagnesiosilica grains with the Fe/(Fe+Mg) ratios in interplanetary dust particles."
The news correspondents obtained a quote from the research from National Aeronautics and Space Administration, "Furthermore, decomposition of brucite present in the condensed magnesiosilica grains was the source for water and the cause of different iron oxidation states, and the formation of amorphous Fe3+-ferrosilica, amorphous Fe3+-Mg, Fe-silicates, and magnesioferrite during thermal annealing. Fayalite and ferrosilite that formed from silica/FeO melts reacted with forsterite and enstatite to form Mg, Fe-silicates. The presence of iron in different oxidation states in extraterrestrial materials almost certainly requires active asteroid-like parent bodies. If so, the possible presence of trivalent Fe compounds in comet P/Halley suggests that Halley-type comets are a mixture of preserved presolar and processed solar nebula dust."
According to the news reporters, the research concluded: "The results from this thermal annealing experiment further suggest that the Fe-silicates detected in the impact-induced ejecta from comet 9P/Temple 1 might be of secondary origin and related to the impact experiment or to processing in a regolith."
For more information on this research see: The formation of Mg,Fe-silicates by reactions between amorphous magnesiosilica smoke particles and metallic iron nanograins with implications for comet silicate origins. Meteoritics & Planetary Science, 2013;48(10):1823-1840. Meteoritics & Planetary Science can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Meteoritics & Planetary Science - onlinelibrary.wiley.com/journal/10.1111/(ISSN)1945-5100)
Our news journalists report that additional information may be obtained by contacting F.J.M. Rietmeijer, NASA, Goddard Space Flight Center, Astrochem Lab, Solar Syst Explorat Div, Greenbelt, MD 20771, United States. Additional authors for this research include J.A. Nuth and A. Pun (see also Silicic Acid).
Keywords for this news article include: Maryland, Minerals, Greenbelt, Silicates, Nanograins, Silicic Acid, United States, Nanotechnology, Emerging Technologies, North and Central America
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