Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Figure 1

Crystal structure of A₃BC₃D₂O₁₄: (a) three-dimensional framework viewed along the -axis; (b) three-dimensional framework viewed along the -axis; the local distorted polyhedron of different cation sites, including decahedral A site, octahedral B site, tetrahedral C site, and tetrahedral D site.

(a)

(b)