Citation: Wang, Yi; Stoyko, Stanislav; Bobev, Svilen (2015). Quaternary Pnictides with Complex, Noncentrosymmetric Structures. Synthesis and Structural Characterization of the New Zintl Phases Na11Ca2Al3Sb8, Na4CaGaSb3, and Na15Ca3In5Sb12.. Inorganic chemistry, 54, pp. 1931-1939.