Abstract
The triple-point pressure of four grades of graphite was determined to be 103 atm (absolute). The triple-point temperature varied from one grade to another with values ranging from 4183 ± 10 to 4299 ± 25°K. The solidus-liquidus temperature measured for one grade increased with increasing pressure from 4247°K at 103 atm to 4306°K at 1000 atm.