A cascade of magnetic phase transitions and a 1/3-magnetization plateau in selenite-selenate Co(SeO)(SeO)(OH) with kagomé-like Co ion layer arrangements: the importance of identifying a correct spin lattice.

We prepared a new compound, Co(SeO)(SeO)(OH), having layers in a kagomé-like arrangement of Co (spin = 3/2) ions. This phase crystallizes in the orthorhombic space group (62) with unit cell parameters = 11.225(9) Å, = 6.

Anhydrous copper tellurite disulfate CuTeO(SO) featuring the coexistence of spin singlets and a long-range antiferromagnetic order.

Anhydrous copper tellurite sulfate, CuTeO(SO), has been synthesized vapor transport reactions in sealed silica glass ampoules. In measurements of magnetization , magnetic susceptibility , specific heat and X-band electron spin resonance, a long-range antiferromagnetic order at = 13 K and an - magnetic phase diagram have been established. One-third of Cu ions were found to form magnetically silent dimers.

New Nabokoite-like Phases ACu TeO (SO ) Cl (A=Na, K, Rb, Cs) with Decorated and Distorted Square Kagome Lattices.

A new family of compounds ACu TeO (SO ) Cl (A=Na, K, Rb, Cs) isostructural to mineral Nabokoite (K species) was synthesized by solid state and gas transport reactions in sealed ampoules and characterized in measurements of magnetization and specific heat in a wide temperature range. These complex compounds are of the utmost interest as a testing playground to study the properties of quasi-two-dimensional magnets with a square kagome lattice geometry. A quantum ground state of such a corner-sharing network is a spin liquid.

Polytypism of Ln(SeO)(HSeO)·2HO compounds: synthesis and crystal structure of the first monoclinic modification of Nd(SeO)(HSeO)·2HO, DFT calculations and order/disorder description.

Compounds with the general formula Ln(SeO)(HSeO)·2HO, where Ln = Sm, Tb, Nd and Lu, are characterized by orthorhombic symmetry with space group P222 and unit-cell parameters in the ranges a ∼ 6.473-6.999, b ∼ 6.

Observation of a 1/3 magnetization plateau in PbCuO(SeO)Cl arising from (Cu) clusters of corner-sharing (Cu) tetrahedra.

A mixed-valence compound PbCuO(SeO)Cl has a complex structure consisting of one nonmagnetic Cu ( = 0) ion and four nonequivalent magnetic Cu ( = 1/2) ions. It exhibits antiferromagnetic ordering at = 10.2 K.