Crystal Structures of Iron-Nitrogen Compounds (image) National University of Science and Technology MISIS Share Print E-Mail Caption Crystal structures of iron-nitrogen compounds. Orange and blue balls show the positions of Fe and N atoms, respectively. a Fe3N2 at 50?GPa. The structure is built of quadrilateral face-capped trigonal prisms NFe7, which are interconnected by sharing trigonal faces and edges. b FeN at 50?GPa with NiAs structure type. c FeN2 at 58?GPa; Shown are the FeN6 octahedra, which are connected into infinite chains through common edges and aligned along the c-axis. These chains are interconnected through common vertices. Additional linkage between FeN6 octahedra is provided via N-N bonds. d FeN4 at 135?GPa. In the structure of FeN4, each Fe atom is a member of two non-planar five-member Fe[N4] metallacycles, which are almost parallel to the (1-10) lattice plane. Nitrogen atoms form infinite zigzag chains, running along the c-direction. Credit © NUST MISIS Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.