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Discovery of nanocrystalline botanical magnetite

Marija Gajdardziska-Josifovska, Richard G. McClean, Marvin A. Schofield, Cynthia V. Sommer and William F. Kean
Discovery of nanocrystalline botanical magnetite
European Journal of Mineralogy (October 2001) 13 (5): 863-870


Using TEM and electon diffraction techniques, nanocrystalline magnetite has been found in Fe-rich extracts from disrupted grass cells. Most of the magnetite nanocrystals show cubo-octahedral shapes, but some have hexagonal prism morphologies. Each group has a narrow size distribution typical of intracellular-boundary organized biomineralization processes responsible for bacterial magnetite. The smallest cubo-octahedral botanical nanocrysts (4 + or - 1 nm) are an order of magnitude smaller than their bacterial counterparts. These botanical nanocrystals are self-organized in ordered, mu m-sized agglomerates, distinct from magnetite strings in magnetotactic bacteria and similar to some pedogenic magnetite currently attributed to inorganic processes. The implications of these results on the search for magnetite records of extraterrestrial and ancient terrestrial life, the origin of terrestrial topsoil magnetite and the potential for bioremediation using botanical magnetite are discussed.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 13
Serial Issue: 5
Title: Discovery of nanocrystalline botanical magnetite
Affiliation: University of Wisconsin-Milwaukee, Department of Physics, Milwaukee, WI, United States
Pages: 863-870
Published: 200110
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 37
Accession Number: 2001-075362
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Annotation: This paper was presented at "Biogenic iron minerals" symposium held in Tihany, Hungary, May 2000
Illustration Description: illus. incl. 1 table
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 200123
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