Zur Kenntnis eines Barium-Lanthanoid-Oxomanganats(IV, V): Ba3ErMn2O9 / On a Barium Rare-Earth Oxomanganate(IV, V): Ba3ErMn2O9

Ch. Rabbow, Hk. Müller-Buschbaum
1994 Zeitschrift für Naturforschung. B, A journal of chemical sciences  
High temperature reactions of BaCO3/MnO/Er2O3 (3:1:1) led to single crystals of Ba3ErMn2O9. The product shows the structure of the hexagonal precious metal oxides Ba3LnRu2O9, but crystallizes with orthorhombic symmetry, space group C122v-Cmc21, a = 5.823 Å, b - 10.099 Å, c = 14.409 Å; Z = 4. The crystal structure is characterized by ErO6 octahedra, Mn2O9 face shared double octahedra and Ba2+ within cuboctahedral and anticuboctahedral coordination by O2-, respectively. In contrast to precious
more » ... al oxides the Mn-Mn distances inside the Mn2O9 double octahedra are elongated
doi:10.1515/znb-1994-0919 fatcat:pp6iqcrptfe43e33ttjn6ih7zy