4 Cu -0.115124651977524 0.295534410002176 -0.031035925235180 Ta 1.506014570924093 1.207634716184697 -0.050550513464833 Cu 1.074039828219658 -0.019931044502607 1.127107400922438 Ta -0.173172321188117 1.406868878249098 1.378593582658993