title: Electron crystallography at atomic resolution: the structure of the odd-chain paraffin n-tritriacontane.
abstract: The crystal structure of the odd-chain paraffin, n-tritriacontane, nC33H68, is determined directly by using low-dose electron microscope images and electron diffraction intensity data from epitaxially grown microcrystals. Phases of the most intense "polyethylene" reflections are determined from triplet structure-invariant relationships often used in X-ray crystallography. Low-dose electron microscopic images provide phases of the low-angle "lamellar" reflections and these can be used with one-dimensional structure-invariant relationships to determine other phases on the 00l reciprocal row. The phase set is sufficient to calculate an electrostatic potential map which is directly interpretable as a structure image at atomic resolution.
authors.affiliation: Electron Diffraction Department, Medical Foundation of Buffalo, Inc., New York 14203.
authors.forename: D L
authors.initials: DL
authors.lastname: Dorset
authors.forename: W P
authors.initials: WP
authors.lastname: Zhang
mesh_terms: D003461:Crystallography / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D008433:Mathematics; D008854:Microscopy, Electron / Q000379:methods*; D015394:Molecular Structure; D010232:Paraffin / Q000737:chemistry*
chemical_list: C070808:tritriacontane; D010232:Paraffin