KMBP2O8 (M = Sr, Ba): a new kind of noncentrosymmetry borophosphate with the three-dimensional diamond-like framework.
Two new isotypic anhydrous borophosphates, KMBP(2)O(8) (M = Sr, Ba), have been prepared under high temperature solution growth (HTSG). Investigation of single-crystal X-ray diffraction shows that they crystallize in noncentrosymmetric space group I42d with the following lattice parameters: a = 7.1095(18), c = 13.882(5)A for KSrBP(2)O(8) and a = 7.202(2), c = 14.300(6)A for KBaBP(2)O(8). The fundamental building block (FBB) of title borophosphates with B:P ratio = 1:2 is 12square:<12square> (symbol square represents BO(4) and PO(4) tetrahedra). The FBBs are further interlocked together to form the final 3D diamond-like architecture. Second-harmonic generation (SHG) on powder samples has been measured using Kurtz and Perry technique, which indicates that they are phase-matchable materials, and their SHG coefficients are measured to be about 1/5 (for KSrBP(2)O(8)) and 1/3 (for KBaBP(2)O(8)) times as large as that of KDP.
Zhao
Dan
D
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Yang Qiao Xi Road No. 155, The Graduate School of the Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
Cheng
Wen-Dan
WD
Zhang
Hao
H
Huang
Shu-Ping
SP
Xie
Zhi
Z
Zhang
Wei-Long
WL
Yang
Song-Lin
SL