Citation: Yu, Hongwei; Young, Joshua; Wu, Hongping; Zhang, Weiguo; Rondinelli, James M.; Halasyamani, P. Shiv (2017). M4Mg4(P2O7)3 (M = K, Rb): Structural Engineering of Pyrophosphates for Nonlinear Optical Applications. Chemistry of Materials, 29, pp. 1845-.