Crystal struture determinations of two synthetic phases

Experimental studies of the phase systems Cu-Te-Sb and Cu-Te-S at temperatures between 350 and 1000 °C have shown the existence of some not previously described Cu-rich phases. One phase, phase A, is stable at temperatures between 400 and 900 °C. At 700°C it shows maximum variation in chemical composition from Cu69Te8Sb23 to Cu63Te32Sb5. The other phase, phase B, is stable at temperatures between 350 and 675 °C. It displays maximum variation in chemical composition at 675°C from 62Te20S18 to Te34S4. Presently crystal structure investigations is carried out on the two phases. This research takes place in cooperation with associate professor I.Søtofte at IK, DTU and professor E.Makovicky at The Geological Institute, KU.