Crystal Structure and Ferromagnetism of the CeFeSi Intermetallic Compound.

We have determined the crystal structure and the magnetic state of the CeFeSi intermetallic compound. Our revised structural model (fully ordered tetragonal unit cell, 4/) agrees with the previous literature report, except for some minor quantitative differences. Magnetically, the CeFeSi undergoes a ferromagnetic transition at the temperature ≈ 94 K.