Synthesis, structure and magnetic properties of new phosphates K2Mn0.5Ti1.5(PO4)3 and K2Co0.5Ti1.5(PO4)3 with the langbeinite structure |
| |
| Authors: | Ivan V Ogorodnyk Igor V Zatovsky Vyacheslav N Baumer |
| |
| Institution: | a Department of Inorganic Chemistry, Taras Shevchenko National University, Volodymyrska str. 64, Kyiv 01033, Ukraine
b STC “Institute for Single Crystals”, National Academy of Science of Ukraine, Lenina ave. 60, Kharkiv 61001, Ukraine |
| |
| Abstract: | New complex phosphates of the general formula K2M0.5Ti1.5(PO4)3 (M=Mn, Co) have been obtained from the melting mixture of KPO3, K4P2O7, TiO2 and CoCO3·mCo(OH)2 or Mn(H2PO4)2 by means of a flux technique. The synthesized phosphates have been characterized by the single-crystal X-ray diffraction and the FTIR-spectroscopy. The compounds crystallize in the cubic system with the space group P213 and cell parameters a=9.9030(14) Å for K2Mn0.5Ti1.5(PO4)3 and a=9.8445(12) Å for K2Co0.5Ti1.5(PO4)3. Both phosphates are isostructural with the langbeinite mineral and contain four formula unit K2M0.5Ti1.5(PO4)3 per unit cell. The structure can be described using M2(PO4)3] framework composed of two MO6] octahedra interlinked via three PO4] tetrahedra. The Curie-Weiss-type behavior is observed in the magnetic susceptibility. |
| |
| Keywords: | Phosphates Crystal structure Single-crystal X-ray diffraction K2M0 5Ti1 5(PO4)3 Langbeinite FTIR spectra Magnetic measurements |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
