title: Pd(2+)-incorporated perovskite CaPd3B4O12 (B = Ti, V).
abstract: Novel A-site ordered perovskites CaPd(3)Ti(4)O(12) and CaPd(3)V(4)O(12) were synthesized under high-pressure and high-temperature of 15 GPa and 1000 °C. These compounds are the first example in which a crystallographic site in a perovskite-type structure is occupied by Pd(2+) ions with a 4d(8) low spin configuration. The ionic models for these compounds were determined to be Ca(2+)Pd(2+)(3)Ti(4+)(4)O(12) and Ca(2+)Pd(2+)(3)V(4+)(4)O(12) by structural refinement using synchrotron X-ray powder diffraction, hard X-ray photoemission, and soft X-ray absorption spectroscopy. Magnetic susceptibility, electrical resistivity, and specific heat measurements demonstrated diamagnetic insulating behavior for CaPd(3)Ti(4)O(12) in contrast to the Pauli-paramagnetic metallic nature of CaPd(3)V(4)O(12).
authors: Department of Chemistry, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan.
authors: Kentaro
authors: K
authors: Shiro
authors: Ikuya
authors: I
authors: Yamada
authors: Naoya
authors: N
authors: Ikeda
authors: Kenya
authors: K
authors: Ohgushi
authors: Masaichiro
authors: M
authors: Mizumaki
authors: Ryoji
authors: R
authors: Takahashi
authors: Norimasa
authors: N
authors: Nishiyama
authors: Toru
authors: T
authors: Inoue
authors: Tetsuo
authors: T
authors: Irifune