title: Structure of liquid Y3Al5O12 (YAG)
abstract: The total structure factor S(Q) and the radial distribution function G(r) of liquid Y3Al5O12 (YAG) were measured at 1770-2230 K by x-ray scattering from samples under containerless conditions in Ar and O2. Nominal coordination numbers are 4 for Al3+ and 6 for Y3+ ions. The G(r) has peaks at r approximately 1.8 A for Al-O, r approximately 2. 25 A for Y-O, and r approximately 3.3-3.6 A assigned to metal ions in adjacent AlO5-4 and YO9-6 polyhedral ions. Relative to the pure oxides, G(r) for molten YAG has smaller half-widths for the Al-O and Y-O peaks, and an increased sensitivity to temperature and the ambient gas composition.
authors.affiliation: Containerless Research, Inc., Evanston, Illinois 60201, USA.
authors.initials: JK
authors.lastname: Weber
authors.initials: S
authors.lastname: Krishnan
authors.initials: S
authors.lastname: Ansell
authors.initials: AD
authors.lastname: Hixson
authors.initials: PC
authors.lastname: Nordine