A compound of unknown structure, whose composition has been found to be La3Ni4Ge4 has been discovered studying phase diagrams of the system La‐Ni‐Ge.

Indexing of these reflexions gave space group P622 with a unit cell related to the r>Jn 5 Si 3 cell by c5 ~ 3c, a5 ~ a-b, bb ~ a+Zb. Intensities were collected on Lu 5 Ir 3 single crystal. Fourier maps have shown disorder along the c a.xis. Using the fact that hko data did not contain any superstructure reflexions, atoms should be split with different z values as it has been made for Eu 5 As

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