The relative distribution of rare-earth ions R3+ (Dy3+ or Ho3+) in the phosphate glass RAl0.30P3.05O9.62 was measured by employing the method of isomorphic substitution in neutron diffraction. It is found that 7.9(7) R-R nearest neighbors reside at 5.62(6) Angstrom in a network made from interlinked PO4 tetrahedra. Provided that the role of Al is explicitly considered, a self-consistent account of the local matrix atom correlations can be developed in which there are 1.68(9) bridging and 2.32(9) terminal oxygen atoms per phosphorus.
Bibliographical note©2003 American Physical Society
- rare-earth ions
- isomorphic substitution
- neutron diffraction
Martin, R. A., Salmon, P. S., Fischer, H. E., & Cuello, G. J. (2003). Identification of the relative distribution of rare-earth ions in phosphate glasses. Physical Review Letters, 90(18), . https://doi.org/10.1103/PhysRevLett.90.185501