  The M-1222 compounds are synthesized in near single phase form. These
compounds crystallise in I4/mmm Tetragonal structure. None of the studied
compound is superconducting but they asre weakly magnetic. This is first report
on synthesis of Cr and Mn -1222 compounds. These compounds are synthesized at
ultra conditions of HPHT that is the 6 Gpa and 1400 C.
