The shrouded boats are then loaded within {HEAD ~ an elongated, cylindrical quartz hot wall reactor tube} which is operating at {TAIL ~ a temperatute} not less than 350° C. and not more than 500° C. and preferably about 425° C 
The shrouded boats are then loaded within { HEAD ~ an elongated , cylindrical quartz hot wall reactor tube } which is operating at { TAIL ~ a temperatute } not less than 350 ° C. and not more than 500 ° C. and preferably about 425 ° C
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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