The mixture comprises a precursor of a desired material within {HEAD ~ a supercritical fluid}, and is initially provided in the chamber under {TAIL ~ first conditions} at which the precursor is stable 
The mixture comprises a precursor of a desired material within { HEAD ~ a supercritical fluid } , and is initially provided in the chamber under { TAIL ~ first conditions } at which the precursor is stable
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH