Mg3Pt(BO3)2O2: The first platinum borate from the flux technique

Investigation of the Pt-B-O system reveals the first magnesium platinum borate Mg3Pt(BO3)2O2 obtained from the high temperature flux method. The compound crystallizes in the centrosymmetric monoclinic space group C2/m (no. 12) with the lattice parameters of a = 16.8073(8) Å, b = 3.10610(1) Å, c = 5.2107(2) Å, and β = 90.546(4)° (Z = 2). The crystal structure of Mg3Pt(BO3)2O2 is based upon isolated BO3 triangles and PtO6 and MgO6 octahedra. The PtO6 octahedra are connected with each other in an edge-sharing manner forming one dimensional (1D) chains. Each of the PtO6 octahedra links with two BO3 units to form anionic [Pt(BO3)2O2]6- chains along the b-axis. MgO6 octahedra are arranged in the form of two dimensional (2D) layers. The 2D MgO6 layers are further connected by the anionic [Pt(BO3)2O2]6- chains into the 3D framework structure of Mg3Pt(BO3)2O2. The material was experimentally and theoretically characterized in regards to its optical and spectroscopic properties. The first HT platinum borate was experimentally and theoretically characterized in regards to its optical and spectroscopic properties. [Display omitted] •The first HT platinum borate Mg3Pt(BO3)2O2 was synthesized by high temperature flux method.•The structure was determined by single-crystal X-ray diffraction.•The novel structural chemistry and comparison with related phases were discussed in detail.•Optical properties of the new phase was experimentally and theoretically studied detailly.