“…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. Addition of a distilled water and a subsequent drying at a room temperature lead to formation of bismuth nitrates.…”