Typically the real mourner's prayer is referred to as El Malei Rachamim in Ashkenazi literature and Hashkavah in Sephardic literature. Normally the mourner's prayer is mistaken for Kaddish. The recitation of the mourner's prayer is finished with the soul of somebody who may have died. The prayer by itself https://www.youtube.com/watch?v=9jkGrywMWdQ