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Oral presentation

Static disorder in the crystal structure of perovskite-type proton-conducting oxide BaSn$$_{0.5}$$In$$_{0.5}$$O$$_{2.75}$$

Hayakawa, Kazutaka*; Nagasaki, Takanori*; Yamada, Tomoaki*; Yoshino, Masahito*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*

no journal, , 

Static disorder in the crystal structure of perovskite-type proton conducting oxide BaSn$$_{0.5}$$In$$_{0.5}$$O$$_{2.75}$$ is investigated by atomistic simulation based on empirical potentials. The neutron scattering length density distribution for Ba and O obtained by the simulation is similar to that obtained by analyzing the neutron powder diffraction data using maximum entropy method.

Oral presentation

Topotactic synthesis and crystal structure of a fluorinated layered iron oxyfluoride

Tsujimoto, Yoshihiro*; Yamaura, Kazunari*; Matsushita, Yoshitaka*; Muromachi, Eiji*; Hayashi, Naoaki*; Kodama, Katsuaki; Igawa, Naoki; Shirako, Yuichi*; Akaogi, Masaki*

no journal, , 

Topotactic reaction of the n = 2 Ruddlesden-Popper phase Sr$$_{3}$$Fe$$_{2}$$O$$_{7-delta}$$ with the Teflon polymer yields a highly fluorinated phase Sr$$_{3}$$Fe$$_{2}$$O$$_{5+x}$$O$$_{2-x}$$ (x $$sim$$ 0.44). The crystal/magnetic structures and anion composition are determined by a combination of neutron diffraction and $$^{57}$$Fe M$"o$ssbauer spectroscopy experiments. Fluoride anions selectively occupy the terminal apical anion sites, leading to the square pyramidal coordination around the Fe metal center. The oxyfluoride material adopts a simple antiferromagnetic ordered structure with k = (1/2 1/2 0) below 390 K.

Oral presentation

Synthesis of a porous Si-C material from polycarbosilane with direct foaming and radiation curing

Idesaki, Akira; Hakoda, Teruyuki; Yamamoto, Shunya; Sugimoto, Masaki; Yoshikawa, Masahito

no journal, , 

no abstracts in English

Oral presentation

Study of metal hydrides using high-pressure technique

Saito, Hiroyuki

no journal, , 

no abstracts in English

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