The method 1 wherein {HEAD ~ the crystalline material} comprises {TAIL ~ from about 10 to about 60 atomic percent germanium} 
comprises
The method 1 wherein { HEAD ~ the crystalline material } comprises { TAIL ~ from about 10 to about 60 atomic percent germanium }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL