Structure D 2000 (Sr 3 N)E and (Ba 3 N)E (E: Sb, Bi): Synthesis, Crystal Structures, and PhysicalProperties. -Single phase powders of (Sr3N)Sb, (Sr3N)Bi, (Ba3N)Sb and (Ba3N)Bi are prepared by melting 1:3 mixtures of Sb(Bi) and Sr(Ba) followed by annealing of the produced metallic reguli in N2 atmosphere at 1070-1120 K. (Sr3N)Sb and (Sr3N)Bi crystallize in the cubic anti-perovskite type structure (space group Pm3m, Z = 1) and (Ba 3 N)Sb and (Ba 3 N)Bi crystallize in the hexagonal anti-BaNiO 3 type structure (P63/mmc, Z = 2). Magnetic susceptibility and electrical resistivity data indicate that the compounds are diamagnetic semiconductors. The optical band gaps of (Sr3N)Sb and (Sr3N)Bi are determined to be 1.15 and 0.89 eV, respectively. The experimental results are in agreement with electronic structure calculations. -(GAEBLER, F.; KIRCHNER, M.; SCHNELLE, W.; SCHWARZ, U.; SCHMITT, M.; ROSNER, H.; NIEWA*, R.

Equilibria E 4000 Stacking Design of Inverse Perovskites: The Systems (Sr3-xBaxN)E, E: Bi, Sb. -The first representatives of 4H (BaMnO 3 -type structure, P6 3 /mmc, Z = 4) and 9R (BaMnO3-type structure, R3m, Z = 9) inverse perovskite phases existing in the title solid solutions are characterized by powder XRD and neutron diffraction. The cubic perovskite phase with Bi (Sb) is stable in the range of 0.00 ≤ x ≤ 0.90 (0.00 ≤ x ≤ 1.30), the 4H variant is stable for 1.55 ≤ x ≤ 2.10 (1.85 ≤ x ≤ 2.45), the 9R structure is stable for 2.50 ≤ x ≤ 2.55 (2.56 ≤ x ≤ 2.60), and the 2H phase is stable for 2.75 ≤ x ≤ 3.00 (2.80 ≤ x ≤ 3.00). Ba occupies preferable sites in the hexagonal stacking of close packed layers of alkaline earth metal ions and E 3-; Sr is mainly located in cubic stacked layers. -(GAEBLER, F.; NIEWA*, R.; Inorg. Chem. 46 (2007) 3, 859-865; MPI Chem. Phys. fester Stoffe,

Magnetic properties D 9000Magnetic Structure of the Inverse Perovskite (Ce3N)In. -The title compound is synthesized from mixtures of CeN, Ce, and In at 1120 K, and characterized by powder XRD, powder neutron diffraction, and magnetic measurements. It crystallizes with the inverse cubic perovskite-type structure in the space group Pm3m (Z = 1). The magnetic moments located on the Ce atoms order below 9 K with a commensurable magnetic structure consisting of three antiferromagnetic substructures parallel to the crystallographic axes. -(GAEBLER, F.; SCHNELLE, W.; SENYSHYN, A.; NIEWA*, R.; Solid State Sci.

0.22 ) 4 O]Bi 2 (I) and [(Ba0.62Sr0.38)10N2O]Bi4 (II) are grown from melts of Ba, Sr, and Bi (N2 atmosphere that contains small amounts of O2, 1123 K). Both compounds crystallize in the tetragonal space group I4/mmm with Z = 2. (I) adopts the K2NiF4 structure type with layers of vertex-sharing (Ba,Sr)4Ba2O octahedra. (II) is isotypic with Sr4Ti3O10 and contains slabs of three layers of vertex-sharing octahedra further connected via corners. The compounds are members of an inverse Ruddlesden-Popper series of general formula (A3n+1ONn-1)Bin+1 with n = 1, 3. -(GAEBLER, F.; PROTS, V.; NIEWA*, R.; Z. Anorg. Allg. Chem. 633 (2007) 1, 93-97; Dep. Chem., TU Muenchen, D-85747 Garching, Germany; Eng.) -Schramke 09-003

Mixed-Valent Compound? -The cubic inverse perovskite (Ca2EuN0.75)Sn is synthesized by solid state reaction of Ca, EuN, and Sn in a molar ratio of 2:1:1 (Ta ampule, 1213 K, 192 h and 1323 K, 96 h). The compound is characterized by powder XRD, XAS, Moessbauer spectroscopy, and electrical resistivity and magnetic susceptibility measurements. The compound is a heavily doped semiconductor in which both di-and trivalent Eu is located on one crystallographic site. Therefore, (Ca2EuN0.75)Sn is regarded as an example for the extremely rare case of a homogeneously mixed-valent europium compound. -(GAEBLER, F.; BRAEUNLING, D.; SCHNELLE, W.; SCHELLENBERG, I.; POETTGEN, R.; NIEWA*, R.; Z. Anorg. Allg. Chem. 637 (2011) 7-8, 977-982, http://dx.