title: Stabilization by a divalent transition metal in lead indium quaternary selenide, Fe(0.47)Pb(8.04)In(17.37)Se(34), and specific indium coordination.
abstract: Single crystals of the first M-Pb-In-Se quaternary selenide, Fe(0.47)Pb(8.04)In(17.37)Se34, with the structure stabilized by a divalent transition metal (M = Fe), have been grown by a solid-state reaction. The Fe(II) ions partially occupy at the In sites with various Fe/In ratios. Thus, a new crystal structure is evolved by partially occupied minor Fe atoms at In sites. A part of the In atoms shows remarkably distorted octahedral coordination. This compound shows relatively high conductivity (approximately 40 S/m at 300 K) with a narrow-band-gap-type semiconducting property (Ea = 0.078 eV).
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, 5-1-5 Kashiwano-ha, Kashiwa, Chiba 277-8581, Japan. chaos_ym@yahoo.co.jp
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Matsushita
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Sugiyama
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ueda