  This is a comment on 'Table-like magnetocaloric effect and enhanced
refrigerant capacity in Eu8Ga16Ge30-EuO composite materials', published few
years ago. Refrigerant Capacity (RC) and Relative Cooling Power (RCP) are
properties that characterize the magnetocaloric effect. RCP and mainly RC are
also important to characterize other i-caloric effects (electrocaloric and
mechanocaloric effects). This comment intends to point out mistakes in a
specific paper and to be helpful to prevent inappropriate comparisons between
RC and RCP.
