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