It was found that selective, phase pure, single crystal growth of type I and type II clathrates can be achieved by maintaining sufficient partial pressure of a chemical constituent during {HEAD ~ slow, controlled deprivation} of {TAIL ~ the chemical constituent} from the primary reactant 
of
It was found that selective , phase pure , single crystal growth of type I and type II clathrates can be achieved by maintaining sufficient partial pressure of a chemical constituent during { HEAD ~ slow , controlled deprivation } of { TAIL ~ the chemical constituent } from the primary reactant
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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH