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Abstract:
PbTe has been investigated using synchrotron X-ray diffraction (XRD) in a diamond anvil cell under quasi-hydrostatic pressures up to 50 GPa. Upon compression to 6.6 GPa, the initial NaCl phase transforms to an intermediate phase, which is confirmed to be an orthorhombic structure with a space group Pnma. At 18.4 GPa, the intermediate Pnma phase undergoes a phase transition to the CsCl structure. The systemic analysis of the crystal structures between the NaCl and intermediate phases indicates that the structure of the Pnma phase could be derived from the distortion of the NaCl structure. The bulk modulus of the CsCl phase is B-0=52(2) GPa with V-0=60.8(4) angstrom(3) and B-0=4.0 (fixed), slightly larger than the NaCl phase (B-0=44(1) GPa) and the intermediate phase (B-0=49(3) GPa).
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HIGH PRESSURE RESEARCH
ISSN: 0895-7959
Year: 2013
Issue: 4
Volume: 33
Page: 713-719
2 . 0 0 0
JCR@2022
ESI Discipline: PHYSICS;
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 14
SCOPUS Cited Count: 16
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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