用octahedra造句子，“octahedra”造句

It was estimated that Mn~(2+) ionssituated in Bi sites of oxygen octahedra,The decrease of EPR signal intensity ofMn ion means the change of the valency of Mn after ultraviolet irradiation.

The rare earth ions lie between the disilicate groups and the sheets of octahedra to form (8+3)-coordinated A(1)-polyhedra and 10-coordinated A(2)-polyhedra.