Ontology highlight
ABSTRACT:
SUBMITTER: Li B
PROVIDER: S-EPMC3478652 | biostudies-literature | 2012 Oct
REPOSITORIES: biostudies-literature
Proceedings of the National Academy of Sciences of the United States of America 20120925 41
Using synchrotron high-pressure X-ray diffraction at cryogenic temperatures, we have established the phase diagram for calcium up to 110 GPa and 5-300 K. We discovered the long-sought for theoretically predicted β-tin structured calcium with I4(1)/amd symmetry at 35 GPa in a s mall low-temperature range below 10 K, thus resolving the enigma of absence of this lowest enthalpy phase. The stability and relations among various distorted simple-cubic phases in the Ca-III region have also been examine ...[more]