Department of Chemistry, 232 Choppin Hall, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Inorg Chem. 2013 May 6;52(9):5055-62. doi: 10.1021/ic302805n. Epub 2013 Apr 19.
Crystal growth, structure determination, and magnetic properties of LnCr2Al(20-x)Fe(x) (Ln = La, Gd, Yb) adopting the CeCr2Al20 structure type with space group Fd3m, a ∼ 14.5 Å, are reported. Single crystal X-ray diffraction and Mössbauer spectroscopy are employed to fully characterize the crystal structure of LnCr2Al(20-x)Fe(x) (Ln = La, Gd, Yb). LnCr2Al(20-x)Fe(x) (Ln = La, Gd, Yb) are the first pseudoternaries adopting the CeCr2Al20 structure type with a transition metal occupying the main group site. The Yb analogues are Pauli paramagnets with the Yb ion adopting an electronic configuration close to Yb(2+), while the Gd analogues show paramagnetic behavior with no magnetic order down to 3 K.
采用空间群 Fd3m，晶胞参数 a ∼ 14.5 Å的 CeCr2Al20 结构类型，报道了 LnCr2Al(20-x)Fe(x)（Ln = La、Gd、Yb）的晶体生长、结构测定和磁性。通过单晶 X 射线衍射和穆斯堡尔谱对 LnCr2Al(20-x)Fe(x)（Ln = La、Gd、Yb）的晶体结构进行了全面表征。LnCr2Al(20-x)Fe(x)（Ln = La、Gd、Yb）是第一个采用 CeCr2Al20 结构类型的赝三元化合物，其中过渡金属占据主族位置。Yb 类似物是具有接近 Yb(2+)电子构型的 Pauli 顺磁体，而 Gd 类似物表现出顺磁行为，在 3 K 以下没有磁有序。
