A is at least one kind of element selected from the group consisting of Al and Ga, the element D is Si and Ge, and {HEAD ~ the element Z} is {TAIL ~ at least one kind} of element selected from the rare earth elements and the transitional metal elements 
is
A is at least one kind of element selected from the group consisting of Al and Ga , the element D is Si and Ge , and { HEAD ~ the element Z } is { TAIL ~ at least one kind } of element selected from the rare earth elements and the transitional metal elements
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH