The entirety of the body region within {HEAD ~ the crystalline material} can be within a single crystal of {TAIL ~ the material} 
The entirety of the body region within { HEAD ~ the crystalline material } can be within a single crystal of { TAIL ~ the material }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL