Structural phase transition of ScSb and YSb with a NaCl-type structure at high pressures

• Published in: Solid state communications 2003-03, Vol.125 (10), p.543-546
• Main Authors: Hayashi, J, Shirotani, I, Hirano, K, Ishimatsu, N, Shimomura, O, Kikegawa, T
• Format: Article
• Language: English
• Subjects: B. Chemical synthesis; C. Crystal structure and symmetry; Chemical synthesis; combustion synthesis; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; D. Phase transitions; E. Strain, high pressure; E. Synchrotron radiation; Exact sciences and technology; Inorganic compounds; Materials science; Materials synthesis; materials processing; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; X-ray diffraction and scattering
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/S0038-1098(02)00889-X

By use of synchrotron radiation, powder X-ray diffraction of ScSb and YSb with a NaCl-type structure has been studied up to 45 GPa at room temperature. A first-order phase transition from the NaCl-type (B1) to a CsCl-type structure (B2) began to occur at around 28 GPa for ScSb and at around 26 GPa for YSb. Crystal data of the high-pressure phase of both antimonides are obtained. The high-pressure structural behavior of ScSb and YSb is similar to that of heavier LnSb (Ln=Dy–Lu). The B1–B2 transition for ScSb and YSb can be understood according to the rigid sphere model. The bulk moduli of ScSb and YSb are about 58 GPa at ambient pressure.