It has been repeatedly observed in this Laboratory that after boiling off from glass ampules liquefied silicon fluoride small amounts of a white residue which volatilize at about room temperature remain, unless the glass ampules are thoroughly dried by flaming while being rinsed many times with dry air. Partial hydrolysis of silicon tetraftuoride to a volatile oxyfluoride seemed a likely source of the residues. In a study by Glenn McIntyre in this ...