The new iron phosphide with the highest phosphorus content of known ion phosphides, FeP₄, was synthesized by the reaction of elemental components at 60 kbar in a cubic anvil device. Its space group was found to be C₂₂₂₁, with four formula units in the unit cell (a = 0.5005(1), b = 1.0213(3), c = 0.530(1) nm). The structure of FeP₄ was analysed by standard Patterson and Fourier techniques and refined by a block-diagonal least-squares method to a final conventional R value of 0.067 for 546 reflections. The coordination around Fe and P in FeP₄ is very similar to that of Cr, Mn, and P in CrP₄ and MnP₄. The difference in structure between these compounds is discussed and correlated to the electronic configuration.

中文翻译：

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新型磷化铁FeP _4的制备及性能

在立方砧装置中，通过60 kbar的元素成分反应，合成了已知离子磷化物FeP _4中磷含量最高的新型磷化铁。发现其空间群为C _{222 1}，在晶胞中具有四个公式单位（a = 0.5005（1），b = 1.0213（3），c = 0.530（1）nm）。FeP ₄的结构通过标准的Patterson和Fourier技术进行了分析，并通过块对角最小二乘法对546次反射进行了改进，最终的常规R值为0.067。在FEP围绕Fe和P中的协调₄是非常相似的Cr，Mn和P的CRP ₄和MnP ₄。讨论了这些化合物之间的结构差异，并将其与电子构型相关。