  In Phys. Rev. Lett. 102, 197002 (2009) it was reported that the element Eu
becomes superconducting in the pressure and temperature range [84-142GPa],
[1.8-2.75K]. The claim was largely based on ac susceptibility measurements.
Recently reported ac susceptibility measurements on a hydride compound under
pressure that appears to become superconducting near room temperature (Nature
586, 373 (2020)) cast serious doubt on the validity of the results for Eu as
well as for the hydride. Here I present results that shed new light on the true
behaviour of Eu. It is argued that the experiments on Eu have to be repeated to
either validate or rule out the claim that it is a superconducting element.
