title: Synthesis, crystal structure, and magnetic properties of Bi3Mn4O12(NO3) oxynitrate comprising S = 3/2 honeycomb lattice.
abstract: Neutron diffraction and FT-IR analysis revealed that the novel oxynitrate Bi(3)Mn(4)O(12)(NO(3)) (space group P3, a = 4.9692(1) A, c = 13.1627(3) A) prepared by hydrothermal synthesis is of a new structural type including flat NO(3) layers alternating with blocks of two PbSb(2)O(6)-like layers. Mn(4+) (S = (3)/(2)) forms a regular honeycomb lattice, and magnetic susceptibility data indicated two-dimensional magnetism. Despite its Weiss constant of -257 K, no long-range ordering was observed down to 0.4 K because of the magnetic frustration due to the competition between the nearest and the next-nearest antiferromagnetic interactions.
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: Olga
authors.initials: O
authors.lastname: Smirnova
authors.forename: Masaki
authors.initials: M
authors.lastname: Azuma
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Kumada
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kusano
authors.forename: Masaaki
authors.initials: M
authors.lastname: Matsuda
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Shimakawa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Takei
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Yonesaki
authors.forename: Nobukazu
authors.initials: N
authors.lastname: Kinomura