Materials Data on Ce8AlPd24 by Materials Project

Ce8Pd24Al crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ce is bonded to twelve Pd atoms to form CePd12 cuboctahedra that share corners with twelve equivalent CePd12 cuboctahedra, faces with six equivalent CePd12 cuboctahedra, and a faceface with one AlPd6 octahedra. There are a spread of Ce–Pd bond distances ranging from 2.98–3.01 Å. There are three inequivalent Pd sites. In the first Pd site, Pd is bonded in a distorted rectangular see-saw-like geometry to four equivalent Ce atoms. In the second Pd site, Pd is bonded in a distorted rectangular see-saw-like geometry to four equivalent Ce atoms. In the third Pd site, Pd is bonded in a 1-coordinate geometry to four equivalent Ce and one Al atom. The Pd–Al bond length is 2.46 Å. Al is bonded to six equivalent Pd atoms to form AlPd6 octahedra that share faces with eight equivalent CePd12 cuboctahedra.

Ce₈Pd₂₄Al结晶于立方Pm-3m空间群（space group）。该晶体结构为三维框架结构。铈（Ce）与12个钯原子配位，形成CePd₁₂立方八面体（cuboctahedra），此类CePd₁₂立方八面体可与12个等价的CePd₁₂立方八面体共享顶点、与6个等价的CePd₁₂立方八面体共享面，同时与1个AlPd₆八面体（octahedra）共享一个面。Ce-Pd键的键长分布范围为2.98~3.01 Å。钯存在3个不等价晶位：在第一个钯晶位中，钯原子以畸变矩形跷跷板构型与4个等价的铈原子配位；在第二个钯晶位中，钯原子同样以畸变矩形跷跷板构型与4个等价的铈原子配位；在第三个钯晶位中，钯原子与4个等价铈原子及1个铝原子配位。Pd-Al键的键长为2.46 Å。铝原子与6个等价的钯原子配位，形成AlPd₆八面体（octahedra），此类AlPd₆八面体可与8个等价的CePd₁₂立方八面体共享面。