Citation: Yu, Hongwei; Pan, Shilie; Wu, Hongping; Yang, Zhihua; Dong, Lingyun; Su, Xin; Zhang, Bingbing; Li, Hongyi (2013). Effect of Rigid Units on the Symmetry of the Framework: Design and Synthesis of Centrosymmetric NaBa4(B5O9)2F2Cl and Noncentrosymmetric NaBa4(AlB4O9)2Br3. Crystal Growth & Design, 13, pp. 3514-.