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