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