Ln₁₄Na₃Ru₆O₃₆ (Ln = Pr, Nd): Two New Complex Lanthanide-Containing Oxides of Ruthenium

The lanthanide-containing ruthenium oxides Ln14Na3Ru6O36 (Ln = Pr, Nd) were prepared as single crystals from molten sodium hydroxide. The two compounds crystallize in the rhombohedral space group R3̄c with cell constants of a = 9.7380(2) and 9.6781(2) Å and c = 55.5716(18) and 55.4156(18) Å for Ln14Na3Ru6O36 (Ln = Pr, Nd), respectively. The structure of the two compounds is composed of two types of slabs that alternate in an AB fashion. Each slab consists of three layers and are arranged to yield a unit cell with a 12-layer structure. Both compounds exhibit magnetic behavior consistent with canted antiferromagnetism.以熔融氢氧化钠（molten sodium hydroxide）为熔剂，制备得到化学式为Ln₁₄Na₃Ru₆O₃₆（Ln = Pr、Nd）的含镧系元素（lanthanide）钌氧化物单晶。该两种化合物均结晶于菱面体晶系空间群（rhombohedral space group）R3̄c，当Ln分别为Pr和Nd时，其晶胞参数依次为a = 9.7380(2) Å、9.6781(2) Å，c = 55.5716(18) Å、55.4156(18) Å。两种化合物的晶体结构由两类层板以AB交替方式堆叠构成，每类层板均包含三个原子层，整体排布形成具有12层结构的晶胞。两种化合物均展现出与倾斜反铁磁性（canted antiferromagnetism）相符的磁学特性。