title: Ba4GaN3O.
abstract: Red transparant platelet-shaped single crystals of tetra-barium gallium trinitride oxide, Ba4GaN3O, were synthesized by the Na flux method. The crystal structure is isotypic with Sr4GaN3O, containing isolated triangular [GaN3](6-) anionic groups. O(2-) atoms are inserted between the slabs of [Ba4GaN3](2+), in which the [GaN3](6-) groups are surrounded by Ba(2+) atoms.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Hashimoto
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
authors.forename: Hisanori
authors.initials: H
authors.lastname: Yamane