Аннотация:New platinum-based intermetallic Pt5Mn2Ge was obtained as a bulk sample using arc-melting of the elements with subsequent high-temperature annealing. The structure of the compound was refined using full-profile Rietveld method. Pt5Mn2Ge is isotypic to recently discovered Pt5Mn2Si and crystallizes in the Rh5Ga2As structure type, space group Pbam, a=5.3791(5) Å, b=10.982(1) Å, c= 4.0201(3) Å, Z=2, an ordered variation of the Rh5Ge3 structure type. DFT calculations predict Pt5Mn2Ge to be a metallic conductor. Magnetic measurements show that the compound has a magnetic transition below ca. 100 K, most likely attributed to ferrimagnetic ordering. This compound is only the second one reported in the Pt-Mn-Ge system.
