ic201575v_si_002.cif (64.41 kB)
K2MIII2(MVIO4)(PO4)2 (MIII = Fe, Sc; MVI = Mo, W), Novel Members of the Lagbeinite-Related Family: Synthesis, Structure, and Magnetic Properties
dataset
posted on 2012-02-06, 00:00 authored by Nikolay
S. Slobodyanik, Kateryna V. Terebilenko, Ivan V. Ogorodnyk, Igor V. Zatovsky, Maksym Seredyuk, Vyacheslav
N. Baumer, Philipp GütlichThe possibility of PO43– for MoO42– partial substitution in
the langbeinite
framework has been studied by exploration of the K–Fe(Sc)–Mo(W)–P–O
systems using the high-temperature solution method. It was shown that
1/3PO43– for MoO42– substitution leads to formation of three novel compounds K2Fe(MoO4)(PO4)2, K2Sc(MoO4)(PO4)2, and K2Sc(WO4)(PO4)2 with slightly increased lattice
parameters and significant distortion of the anion tetrahedra without
structure changes. In contrast, the antiferromagnetic structure is
modified by substitution in the low-temperature region. The structural
peculiarities are discussed in light of bond-valence sums calculations.
