title: Calcium L-edge XANES study of some calcium compounds.
abstract: The Ca L3,2-edge XANES spectra of six calcium salts have been measured in both total electron and fluorescence yields using a high-resolution spherical grating monochromator. The compounds investigated were; CaF2, CaCO3, CaCl2 x 2H2O, calcium phosphate, calcium glycerophosphate and calcium gluconate. We find that the fine structure of the Ca L3,2-edges for each compound is unique and relates to the local structure of the Ca atom. The implications of these results to the study of the structure of calcium binding sites in systems of biologically interest will be discussed.
authors.affiliation: Department of Chemistry, The University of Western Ontario London, Canada. snaftel@julian.uwo.ca
authors.forename: S J
authors.initials: SJ
authors.lastname: Naftel
authors.forename: T K
authors.initials: TK
authors.lastname: Sham
authors.forename: Y M
authors.initials: YM
authors.lastname: Yiu
authors.forename: B W
authors.initials: BW
authors.lastname: Yates
mesh_terms: D001665:Binding Sites; D002119:Calcium Carbonate / Q000737:chemistry; D002122:Calcium Chloride / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry* / Q000378:metabolism; D002124:Calcium Fluoride / Q000737:chemistry; D002130:Calcium Phosphates / Q000737:chemistry; D005994:Glycerophosphates / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission / Q000379:methods
chemical_list: D017610:Calcium Compounds; D002130:Calcium Phosphates; D005994:Glycerophosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; D002119:Calcium Carbonate; C485829:calcium phosphate, dibasic, anhydrous; D002122:Calcium Chloride; D002124:Calcium Fluoride