Materials Data on Pm2Mg by Materials Project

MgPm2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Mg is bonded in a body-centered cubic geometry to eight Pm atoms. There are a spread of Mg–Pm bond distances ranging from 3.33–3.40 Å. There are two inequivalent Pm sites. In the first Pm site, Pm is bonded in a 12-coordinate geometry to six equivalent Mg and four equivalent Pm atoms. There are two shorter (3.71 Å) and two longer (3.73 Å) Pm–Pm bond lengths. In the second Pm site, Pm is bonded in a 12-coordinate geometry to two equivalent Mg and ten Pm atoms. There are four shorter (3.47 Å) and two longer (3.80 Å) Pm–Pm bond lengths.

MgPm₂结晶于正交晶系Cmcm空间群。该晶体结构为三维结构。镁（Mg）原子以体心立方配位模式与8个钷（Pm）原子成键，Mg-Pm键长分布于3.33~3.40埃之间。体系中存在两种不等价的钷（Pm）原子位点：在第一种钷（Pm）位点中，钷（Pm）原子采用12配位模式，与6个等价的镁（Mg）原子及4个等价的钷（Pm）原子成键，其Pm-Pm键长包含2个较短键长（3.71埃）与2个较长键长（3.73埃）；在第二种钷（Pm）位点中，钷（Pm）原子采用12配位模式，与2个等价的镁（Mg）原子及10个钷（Pm）原子成键，其Pm-Pm键长包含4个较短键长（3.47埃）与2个较长键长（3.80埃）。