CdBiO2NO3, a new layered bismuth oxide nitrate

Add time:07/29/2019    Source:sciencedirect.com

Step-wise reaction of CdO, Bi2O3, and Cd(NO3)2·4H2O leads to formation of a novel bismuth oxide nitrate, CdBiO2NO3, which completes the family of bismuthite-like MIIBiO2NO3 oxide nitrates. The new compound is tetragonal, I4/mmm, a = 3.9486(1)Å, c = 14.2235(2)Å; its crystal structure resembles those of PbBiO2NO3 and CaBiO2NO3, except for, probably, different positioning of the nitrate group. The compound is stable until ∼425 °C when it decomposes, in one step, into CdO and a mixture of Bi–Cd oxides. Cd-based analogs of isostructural PbLnO2NO3 (Ln – lanthanides) oxide nitrates are unlikely to exist. We discuss the similarities and differences in the structures of layered oxyhalides and oxynitrates of bismuth and rare-earths.

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