https://doi.org/10.1007/s100510051000
The velocity of sound and compressibility in the melts of Hg-Te system
Department of Physics, Faculty of Sciences, Niigata University,
Ikarashi 2-8050, Niigata 950-2181, Japan
Corresponding author: a yoshimi@rlxjksl2.sc.niigata-u.ac.jp
Received:
2
September
1998
Revised:
16
March
1999
Published online: 15 November 1999
Liquid Hg-Te system has been investigated as a function of composition and temperature by measuring the velocity of sound. A minimum in the sound velocity as a function of temperature observed for Te persists up to 50 at.% Hg, of which the position increases rather steeply between 20 and 30 at.% Hg. This suggests that the molten HgTe and alloys in the Te-rich side undergo structural changes involving the change in coordination number with increasing temperature, and the crossover of the nature of the chemical bond from p-p σ to sp3 covalent bond takes place with changing composition. It is concluded that the structural change in liquid HgTe is due to intrinsic nature of bonding of HgTe as a compound.
PACS: 62.60.+v – Acoustical properties of liquids / 65.50.+m – Thermodynamic properties and entropy / 65.70.+y – Thermal expansion and density changes; thermomechanical effects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999