Magnetic order in the anhydrous cubic nitrates K3Ce2(NO3)9 and Na3Gd2(NO3)9

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

“…We were motivated to study the magnetic properties of the K 3 Ln 2 (NO 3 ) 9 materials by the close similarity to the unusual icosahedral crystal field environment in the Ln 2 Mg 3 (NO 3 ) 12 $24H 2 O compounds, coupled with the novelty of a cubic lattice. In previous work we have found the g tensor of K 3 Nd 2 (NO 3 ) 9 is rather close to that of the corresponding Nd 2 Mg 3 (NO 3 ) 12 $24H 2 O, but those of the Ce compounds are not similar [12,13]. The Ce and Nd compounds order antiferromagnetically, but the isostructural Na 3 Gd 2 (NO 3 ) 9 is a ferromagnet.…”

“…In addition to EPR measurements on the Pr and Sm compounds and those reported earlier on K 3 Nd 2 (NO 3 ) 9 [12] and K 3 Ce 2 (NO 3 ) 9 [13], we have also made measurements of single crystal samples of K 3 La 2 (NO 3 ) 9 doped at the 1% level with Dy 3C , Er 3C , and Yb 3C . In similar measurements using LaMN as the host crystal, both Dy 3C and Er 3C display g factors only slightly different from those derived from perfect icosahedral symmetry [7,8].…”

“…Static magnetic susceptibilities were measured using shaped single-crystal spherical samples with diameters of 1-2 mm, coated with vaseline to prevent water absorption from the atmosphere. Measurements above 1.7 K were made using a Quantum Design MPMS SQUID magnetometer, and below 2.5 K with fluxgate magnetometers in a dilution refrigerator, as described previously [12,13]. Paramagnetic resonance measurements were taken with a Bruker ECS 106 spectrometer at temperatures between 2 and 3 K.…”

Crystal structure of Ag3Dy2(NO3)9 and quantitative comparison to isotypic compounds

“…Double nitrates of alkali metals and lanthanides of the composition A 3 Ln 2 (NO 3 ) 9 have been found to crystallize in the chiral space groups P4 1 32 and P4 3 32 (Wickleder, 2002). After the first finding of K 3 Pr 2 (NO 3 ) 9 by Carnall et al (1973), this structure type has been observed in several compounds, to date with K (Carnall et al, 1973;Vigdorchik et al, 1992;Guillou et al, 1995;Gobichon et al, 1999), Rb (Vigdorchik et al, 1990;Manek & Meyer, 1993a;Guillou et al, 1996), and NH 4 (Manek & Meyer, 1992) as 'A 0 cations for the lighter lanthanides La-Sm, and also detached examples with Na at the 'A 0 site (Stockhause & Meyer, 1997;Luo & Corruccini, 2004) and Eu (Manek & Meyer, 1992), Gd (Manek & Meyer, 1992;Luo & Corruccini, 2004), and even Bi (Goaz et al, 2012) at the lanthanide site have been reported. The compounds are typically synthesized by dissolving the lanthanide oxides or nitrates in melts of the respective alkali metal or ammonium nitrates under anhydrous atmosphere, while lanthanum and cerium compounds have been crystallized from solutions in H 2 O or HNO 3 (Guillou et al, 1995(Guillou et al, , 1996Gobichon et al, 1999).…”

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

“…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.…”