Ca_0.8Y_2.4Sn_0.8O₆, a quaternary oxide with mixed occupations of Ca/Y and Y/Sn

Abstract

A new quaternary oxide, calcium yttrium stannate, Ca(0.8)Y(2.4)Sn(0.8)O(6), is isostructural with Mg(3)TeO(6) (trigonal, R-3). The empirical formula can be expressed as (Ca(0.2667)Y(0.7333))(6)(Y(0.4)Sn(0.6))SnO(12). The Ca/Y site has a distorted coordination octahedron of O atoms, with Ca/Y-O distances ranging from 2.227 (3) to 2.350 (3) Angstrom, while the octahedra of O atoms that coordinate to the Sn and Y/Sn sites are nearly regular, with an Sn-O distance of 2.066 (2) Angstrom and a Y/Sn-O distance of 2.147 (3) Angstrom.

Quantitative determination of site occupancy of multi-rare-earth elements doped into Ca2SnO4 phosphor by electron channeling microanalysis

“…Ca 0.8 Y 2.4 Sn 0.8 O 6 peaks (rhombohedral, space group: R3 (no. 148)) [13] appeared in the XRD pattern of the samples with x¼0.6. 3 shows the PL excitation and emission spectra of Eu20Y20, Eu50Y50 and Eu20.…”