New bismuth calcium oxysilicate with apatite structure: Synthesis and structural characterization

A new anhydrous bismuth potassium nitrate, K3Bi2(NO3)9: Synthesis, structure characterization and thermal decomposition

“…We presented here a part of the results obtained under the ongoing experimental study aimed at a development of new Bi-based photocatalysts with using Bi(NO 3 ) 3 ·5H 2 O as source of bismuth. Other new phases discovered in reaction products obtained in due course of this study were reported in [13,15,16]. We believe that that detailed information about structure, morphology, chemical composition and thermal stability of the newly found K 3 Bi 2 (NO 3 ) 9 phase would be of interest for diverse sections of research community.…”

“…Therefore we have assumed that the synthesized phase is Bi-structural analog of a K 3 Pr 2 (NO 3 ) 9 phase. Indeed, both elements have 3 + active valence, and many cases of Bi-lanthanides substitution in crystal structures were reported [15,[18][19][20]. Following this primary finding, we tried to synthesize a pure K 3 Bi 2 (NO 3 ) 9 phase, but our attempts were not successful.…”

Synthetic Phase with the Structure of Apatite

“…New bismuth calcium silicon oxide Ca 4 Bi 4.3 (SiO 4 )(HSiO 4 ) 5 O 0.95 , with the apatite structure was synthesized by UVAROV et al [215]. The structure was refined from the powder X-ray diffraction data.…”