Phase Diagrams of the Cuprous Halides to High Pressures
- 15 August 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 172 (3) , 838-847
- https://doi.org/10.1103/PhysRev.172.838
Abstract
The phase diagrams of CuCl and CuBr to 40 kbar consist of three solid phases and the liquid. One new phase of CuCl, probably disordered bcc, was encountered. The stability region of hexagonal CuBr II is terminated at 6.1 kbar. At higher pressures, there is a direct transition from the zinc-blende structure to disordered bcc. The phase diagram of CuI is complex, with at least seven solid phases, of which five were previously known, below the melting curve to 40 kbar. Hexagonal CuI II cannot exist at higher pressures than 2.2 kbar. The melting curves of the disordered bcc phases of CuCl and CuBr at first rise steeply with pressure, but flatten off considerably above ∼25 and ∼30 kbar, respectively. This is ascribed to the presence of a denser species in the melt.Keywords
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