作者:H. Kohlmann、H. E. Fischer、K. Yvon
DOI:10.1021/ic001225d
日期:2001.5.1
It crystallizes with the cubic perovskite structure (space group Pm3m, a = 380.01(2) pm, Z = 1) in which palladium is octahedrally surrounded by fully occupied deuterium sites. Metallic hydrides at low Eu content form by reversible hydrogen absorption of intermetallic EuPd(2) (Fd3m, a = 775.91(1) pm, Z = 8). Depending on the experimental conditions at least three phases with distinctly different hydrogen
据报道,第一个具有完全结构特征的三元euro钯氢化物(氘)。最富Eu的化合物是Eu(2)PdD(4)。它的beta-K(2)SO(4)类型结构(空间群Pnma,a = 749.47(1)pm,b = 543.34(1)pm,c = 947.91(1)pm,Z = 4)包含四面体18-电子[PdD(4)](4)(-)络合阴离子和二价Eu阳离子。该化合物大概是非金属的,并且在T(C)= 15.1(4)K时具有铁磁有序顺磁性行为(mu(eff)= 8.0(2)mu(B))。中等Eu含量的金属化合物是EuPdD(3) )。它结晶为立方钙钛矿结构(空间群Pm3m,a = 380.01(2)pm,Z = 1),其中钯八面体被完全占据的氘位包围。低Eu含量的金属氢化物通过金属间EuPd(2)(Fd3m,a = 775.91(1)pm,Z = 8)。根据实验条件,至少存在三个氢含量x明显不同的三相:EuPd(2)H(x)(约)(0