Ba6Sn6Se13: a new mixed valence selenostannate with NLO property†
Abstract
A new ternary selenostannate Ba6Sn6Se13 has been synthesized by a high temperature solid-state method. The compound crystallizes in the non-centrosymmetric orthorhombic space group P212121 and may be represented as Ba6Sn52+Sn4+Se13 with mixed valence Sn atoms. Sn4+