Die Kristallstrukturen von CsBiO₂ und Cs₃BiO₃

Abstract

CsBiO2 (hellgelb) und Cs3BiO3 (gelb) wurden durch Festkörperreaktion aus den binären Komponenten Cs2O und Bi2O3 bei Temperaturen von 700°C bzw. 550°C dargestellt. In CsBiO2 liegen nach der Einkristallröntgenstrukturanalyse (C2/c; a = 827,4(2); b = 920,4(2); c = 597,87(9) pm; β = 122,51(1)°; Z = 4; 975 Diffraktometerdaten; R1 = 0,058; wR2 = 0,077) unendlich ausgedehnte ∞1[BiO2/2O′2/2]‐Ketten vor. Die Kristallstruktur von Cs3BiO3 (P213; a = 920,86(8) pm; Z = 4; 289 Diffraktometerdaten; R1 = 0,048; wR2 = 0,081) enthält ‚isolierte’︁ pyramidale BiO33−‐Anionen. Die Kationenanordnung in Cs3BiO3 entspricht der Atom‐anordnung in der intermetallischen Phase Cs3Bi.

Bi3+Electronic Lone Pair Configuration in the Modulated Bi-2212 Type Oxides

“…(14)(15)(16)(17)(18). From atomic positions given in the literature, the locations of the lone pairs of the bismuth atoms have been determined by using the calculation method described above in Section 2 and the oxygen environments of Bi are discussed.…”

Distribution of the M-M Distances in the Rare Earth Oxides

“…structure of elemental calcium (O'Keeffe & Hyde, 1985) and that the three O atoms of some ABO 3 perovskites are inserted into the holes of the corresponding AB alloys without any volume increase (Martõ Ânez-Cruz et al, 1994;RamosGallardo & Vegas, 1997). Other compounds which behave in this manner are the tetragonal YbOOH (Vegas & Isea, 1997) and Cs 3 BiO 3 (Zoche & Jansen, 1997).…”

K4Bi2O5, a Novel Ternary Oxobismuthate(III)

“…We have reinvestigated the compounds ABiO (A"K, Rb, Cs), revised the former crystal structure determinations, and found that all compounds from sodium to caesium are isostructural (5,6). In the A BiO series we found K BiO (7), which has the same crystal structure as Na BiO .…”