Resumen de Synthesis and crystal structure determination of the new olivine-type compound Mn_(2)Sn□Se_(4)
C. Chacón, P. Delgado Niño, Gerzon E. Delgado
The Mn_(2)Sn□Se_(4) compound, manganese tin selenide, was synthesized by the melt and annealing technique and its structure was refined by the Rietveld method using X-ray powder diffraction data. This compound crystallizes in the olivine-type structure with unit cell parameters a = 12.9028(2) Å, b = 7.9001(1) Å, c = 6.5015(1) Å, V = 662.72(2) Å^(3) in the orthorhombic space group P nma (N◦ 62). This olivine structure can be described from a hexagonal close-packing of selenium atoms where manganese atoms occupy 1/2 of the octahedral sites while thin atoms lay in 1/8 of the tetrahedra.
