[Bi12O14E12]nColumns and Lone PairsEin Bi13Mo4VO34E13: Synthesis, Crystal Structure, and Chemistry of the Bi2O3–MoO3–V2O5System

Oxygen-ionic conductors based on substituted bismuth molybdates with column-type structural fragments

“…The homogeneity ranges were determined by XRD for all series under study. The widest homogeneity range (up to x = 1.0) was observed for Bi 13 Mo 5 -х V х O 34 -δ solid solutions, which agrees with the data of [4,5]. For titanium and niobium doped compounds, the formation of solid solutions was limited to x = 0.2.…”

“…The compounds have oxygen ionic con ductivity; they can compete with BIMEVOX and YSZ in electric conductivity [7] and hence are an alterna tive electrolytic material for gas discharge mem branes, separators, sensors, and fuel cells. As shown in [4], the composition of 5 showed a para bolic dependence of electric conductivity on composi tion with a maximum for Ln = Gd (6.6 × 10 -3 S cm -1 at 973 K).…”

“…n n + [4,5]. This type of structure anisotropy is rarely met in other bismuth containing complex oxides and shows itself as the anisotropy of properties.…”

Structure and electrical conductivity of cobalt-doped Bi26Mo10O69

“…The structure of Bi 26 Mo 10 O 69 ± δ (Bi 13 Mo 5 O 34 ± δ ), which has been estab lished comparatively recently, is close to the structure of stoichiometric Bi(Bi 12 O 14 )Mo 4 VO 20 ± δ [17] and is related to the structure of γ'(Н)-Bi 2 MoO 6 . This struc ture can be described as a network of infinite columns (channels) (Bi 12 O 14 ) n , surrounded by (Mo,V)O 4 poly hedra and additional isolated bismuth atoms.…”

Substutited molybdates of bismuth on a basis of Bi13Mo5O34±δ: production and properties

“…Висмутсодержащие соединения кри-сталлизуются в различных типах струк-тур, например флюоритоподобных на основе δ-Bi 2 O 3 [1], перовскитоподоб-ных слоистых семейства BIMEVOX [2] 4 , расположенные слоями параллельно плоскостям (100) и (001) и изолированные атомы Bi, также на-ходящиеся в слоях между тетраэдра-ми [4,5]. Было установлено, что она обеспечивает эффективный ионный транспорт вдоль кристаллохимиче-ского направления распространения колончатых фрагментов (оси y).…”