Paramagnetic properties of several rare earth compounds with K3Ln2(NO3)9 structure

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

“…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.…”

“…We suggest therefore that a window of conditions for preparation of a pure potassium-bismuth nitrate from used components is very narrow. Therefore for detailed characterization and Rietveld structural refinement we chose a two-phase sample (as-synthesized) containing K 3 Bi 2 (NO 3 ) 9 and BiOCl. Taking into account the aforesaid K 3 Pr 2 (NO 3 ) 9 structure has been chosen as base model at structure refinement.…”

“…Crystalline structure and thermal properties of anhydrous double lanthanum potassium nitrate K 3 La 2 (NO 3 ) 9 was reported by Gobichon et al [3]. Single crystals of K 2 La 2 (NO 3 ) 9 were obtained from evaporation of a concentrated nitric acid solution of KNO 3 and La(NO 3 ) 3 ·6H 2 O with the molar ratio 3: 2 at room temperature. Syntheses of Na 3 Nd 2 (NO 3 ) 9 , Rb 3 M 2 (NO 3 ) 9 (M = La, Pr, and Sm) and (NH 4 ) 3 M 2 (NO 3 ) 9 (M = La-Gd) with cubic structure were reported by Meyer et al [4][5][6].…”

“…212) space group or to monoclinic system (when Ln = Er). Later Guillou et al [2] reported observation of cubic K 3 Ce 2 (NO 3 ) 9 phase. In this case material was obtained by the evaporation at 313 K of an aqueous solution of cerous nitrate hexahydrate and potassium nitrate.…”

“…The infrared and Raman spectral characterization were performed for Pr and Nd salts only [1]. Magnetic susceptibility and paramagnetic resonance were reported in [7][8][9] for K 3 Nd 2 (NO 3 ) 9 . Chowdhury et al [10,11] have studied optical properties of K 3 Ln 2 (NO 3 ) 9 (Ln = Pr, Nd, and Sm) single crystals using low-temperature absorption and circular dichroism spectroscopy.…”