title: Magic-angle spinning nuclear magnetic resonance study of the structure of some PbO-Al2O3-P2O5 glasses.
abstract: Some PbO-Al2O3-P2O5 glasses have been investigated using 31P and 27Al magic-angle spinning nuclear magnetic resonance. The observed spectra could be divided into two groups. In the first, Al(IV), Al(V) and Al(VI) are observed, the 31P linewidths are large and the chemical shift range (-30 to -36 ppm) is typical of network phosphate. In the second group, only Al(VI) is observed, the 31P linewidths are much narrower and the shifts are less negative (-18 to -28 ppm).
authors: Physics Department, Warwick University, Coventry, UK.
authors: M W
authors: MW
authors: Lockyer
authors: D
authors: D
authors: Holland
authors: A P
authors: AP
authors: Howes
authors: R
authors: R
authors: Dupree
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010087:Oxides / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D017553:Phosphorus Compounds
chemical_list: D010087:Oxides; D017553:Phosphorus Compounds; D010758:Phosphorus; D007854:Lead; C047365:lead oxide; C012500:phosphorus pentoxide; D000537:Aluminum Oxide