Phase transformation of the monochalcogenides SmX (X = S, Se, Te) under high pressure
The high pressure behaviour of the monochalcogenides of samarium was investigated up to pressures of 55 GPa using the energy dispersive X-ray diffraction technique and synchrotron radiation. SmTe and SmSe show abnormal volume changes around 5 and 7 GPa respectively. SmS shows a phase transformation at low pressure (less than 1.8 GPa), retaining the same cubic structure, but undergoing a considerable volume collapse and a change of colour. SmS and SmSe both exhibit a phase transition from NaCl type to CsCl type structure at high pressure, which has not been observed previously.
Bibliographic Reference: Article: Journal of Alloys and Compounds, Vol. 226 (1995) pp. 143-145
Record Number: 199512105 / Last updated on: 1996-01-15
Original language: en
Available languages: en