The high-field magnetic properties and order of the gem mineral green dioptase Cu$_6[$Si$_6$O$_{18}]\cdot 6$H$_2$O have been studied by means single-crystal neutron diffraction in fields up to $21~$T magnetization measurements $30~$T. In zero field, Cu$^{2+}$-moments antiferromagnetic chains are oriented along $c$-axis with a small off-axis tilt. For field applied parallel $c$-axis, shows spin-...

Recent experiments suggest a quantum spin liquid ground state in the material PbCuTe$_2$O$_6$, where $S=1/2$ moments are coupled by antiferromagnetic Heisenberg interactions into three dimensional structure of corner sharing triangles dubbed hyper-hyperkagome lattice. It exhibits richer connectivity, and thus likely stronger geometric frustration, than relatively well studied hyperkagome Here, ...

New monoclinic ($P2$/$c$) tungstates - a medium-entropy tungstate, (Mn,Ni,Cu,Zn)WO$_4$, and high-entropy (Mn,Co,Ni,Cu,Zn)WO$_4$ were synthesized characterized. Their phase purity solid solution nature confirmed by powder X-ray diffraction Raman spectroscopy. absorption spectroscopy was used to probe the local structure around metal cations. The atomic structures based on ideal model optimized s...

This study investigates the photocatalytic water splitting performance for N i x W 6 S e 8 ( = 1 , 2 3 4 ) ${\mathrm{N}}{{\mathrm{i}}_{\mathrm{x}}}{{\mathrm{W}}_6}{\mathrm{S}}{{\mathrm{e}}_8}\;( {x 1, 2, 3, 4} )$ Chevrel phases with chemical formula MxMo6Ch8, where M is a metal and Ch chalcogen, being 0, or 4. Density Functional Theory (DFT) used to ${\mathrm{N}}{{\mathrm{i}}_{\mathrm{x}}}{{\ma...