Compressibility of Fe1.087Te: a high pressure X-ray diffraction study

Fe1.087Te exhibits three phases in the pressure range from ambient to 16.6 GPa and becomes amorphous at higher pressures. All three phases have tetragonal symmetry. The low pressure T-phase is stable in the pressure range 0≤P<4.1 GPa and is found to be relatively soft having zero pressure bulk modulus B 0=36(1) GPa. The intermediate cT-phase is less compressible with B 0=88(5) GPa and stable in the pressure range 4.1≤P<10 GPa while a more compressible phase was observed between 10 and 16.6 GPa.