title: BiSr3(YO)3(BO3)4: a new gaudefroyite-type rare-earth borate with moderate SHG response.
abstract: The synthesis, crystal structure, crystal growth, and characterization of a new noncentrosymmetric rare-earth borate BiSr(3)(YO)(3)(BO(3))(4) are reported. BiSr(3)(YO)(3)(BO(3))(4) belongs to gaudefroyite type of structure and crystallizes in the polar hexagonal space group P6(3) (no. 173) with a = 10.6975(16) Å and c = 6.7222(12) Å. In the structure, the YO(7) polyhedra share edges to form an one-dimensional chain along the [001] direction. These chains are interconnected by the BO(3) group to construct a three-dimensional framework, leaving two kinds of channels for Bi atoms and Sr atoms together with BO(3) groups, respectively. On the basis of the powder second-harmonic generation (SHG) measurement, BiSr(3)(YO)(3)(BO(3))(4) belongs to the phase-matchable class with a SHG response of about 3 × KDP.
authors.affiliation: National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), Department of Physics, Northwest University, Xi'an, 710069, China. gaojh@nwu.edu.cn
authors.forename: Jianhua
authors.initials: J
authors.lastname: Gao
authors.forename: Shuai
authors.initials: S
authors.lastname: Li