Citation: Alexander Rothenberger; Collin Morris; Hsien-Hau Wang; Duck Young Chung; Mercouri G. Kanatzidis (2009). Soft-Hard Acid-Base Interactions: Probing Coordination Preferences of Sulfur and Selenium in Mixed Chalcophosphates in the Family APbPS4-xSex (A = K, Rb, Cs; x= 0-4). Inorganic Chemistry, 48, pp. 9036-9040.