title: Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnOx.
abstract: Biogenic materials are produced by microorganisms and are typically found in a nanophase state. As such, they are difficult to characterize structurally. In this report, we demonstrate how high-energy X-ray diffraction and atomic pair distribution function analysis can be used to determine the atomic-scale structures of MnO(x) produced by bacteria and fungi. These structures are well-defined, periodic, and species-specific, built of Mn-O(6) octahedra forming birnessite-type layers and todorokite-type tunnels, respectively. The inherent structural diversity of biogenic material may offer opportunities for practical applications.
authors.affiliation: Department of Physics, 203 Dow Science, Central Michigan University, Mt. Pleasant, Michigan 48859, USA. petkov@phy.cmich.edu
authors.forename: V
authors.initials: V
authors.lastname: Petkov
authors.forename: Y
authors.initials: Y
authors.lastname: Ren
authors.forename: I
authors.initials: I
authors.lastname: Saratovsky
authors.forename: P
authors.initials: P
authors.lastname: Pastén
authors.forename: S J
authors.initials: SJ
authors.lastname: Gurr
authors.forename: M A
authors.initials: MA
authors.lastname: Hayward
authors.forename: K R
authors.initials: KR
authors.lastname: Poeppelmeier
authors.forename: J-F
authors.initials: JF
authors.lastname: Gaillard
mesh_terms: D000164:Acremonium / Q000737:chemistry / Q000378:metabolism*; D018360:Crystallography, X-Ray; D042743:Leptothrix / Q000737:chemistry / Q000378:metabolism*; D017895:Manganese Compounds / Q000737:chemistry* / Q000378:metabolism*; D008903:Minerals / Q000737:chemistry / Q000378:metabolism; D010087:Oxides / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D017895:Manganese Compounds; D008903:Minerals; D010087:Oxides; C027424:manganese oxide