A new layered indium selenium oxychloride material: Synthesis, structure, and characterization of InSeO_3Cl

摘要

A new layered indium selenium oxychloride material, InSeO_3Cl has been synthesized by a standard solid-state reaction using In_2O_3, InCl_3, and SeO_2 as reagents. Single-crystal X-ray diffraction was used to determine the structure of the reported material. InSeO_3Cl crystallizes in the orthorhombic space group Pbca (No. 61), with a = 7.0580(14) A, b = 7.0390(14) A, c = 16.206(3) A, V = 805.1(3) A~3, and Z = 8. InSeO_3Cl has a layered structure consisting of distorted InO_4Cl_2 octahedra and SeO_3 polyhedra. The Se~(4+) cations are in asymmetric coordination environment attributed to their stereoactive lone pairs. The lone pairs on the Se~(4+) cations approximately point in the [101], [-10-1], [10-1], and [-101] direction. A separation of the halophile and the chalcophile moieties is observed from the reported material. Detailed structural analysis with full characterization including infrared spectroscopy, bond valence calculations, thermogravimetric analysis, elemental analysis, and dipole moment calculations are reported.