The Crystal Structure of alpha-Bi2O2.

Extension of the “1201” Family to Strontium-Rich Chromite and Ferrite, Bi0.4Sr2.5Cr1.1O4.9 and Bi0.4Sr2.5Fe1.1O5

“…6. The environments are regular octahedra with a single Bi-O distance in NaBiO 3 (16) and two types of distorted octahedral coordination in Bi 2 O 3 (17). As expected, an energy shift between the two reference compounds can be EXTENSION OF THE ''1201'' FAMILY seen, in connection with bismuth formal charge.…”

Chemically stabilized δ-Bi2O3 phase: Raman scattering and X-ray diffraction studies

“…The d-Bi 2 O 3 crystal structure has P2 1 /c space group with two Bi atoms located at two independent 4e Wyckoff sites and three O atoms located at three independent 4e Wyckoff sites 23 . The Bi has two different coordination numbers: Bi1 has fivefold coordination and Bi2 has six-fold coordination.…”

Synthesis, Crystal Structure, Infrared Characterization, and Electrical Properties of the New Bi9(V1−xPx)2ClO18Series (0≤x≤1)

“…Both short and long bond lengths are observed: The bismuth atoms typically coordinate more tightly with three or four atoms on one side (bond lengths 2.10-2.40 A s ) and less tightly with three, four, or five atoms on the other side (bond lengths 2.40-2.90 A s ). These two bunches of neighbors clearly involve the 6s lone pair steric effect and correspond to the two distinct Bi-O length ranges, 2.08-2.29 A s and 2.48-2.80 A s , observed in -Bi O (20). In Bi V ClO , if only the short distances on one side are considered, Bi(1), Bi(4), Bi(7), and Bi(8) are surrounded by three oxygen atoms, forming with the bismuth atom trigonal pyramids whereas Bi(2), Bi(3), Bi(5), Bi (6), and Bi (9) are surrounded by four oxygens, leading to BiO square …”