Thermoelastic properties of Zn3P2

The bulk modulus and thermal expansion of Zn3P2 has been investigated at pressures up to 21 GPa and temperatures down to 100 K. The experimental zero-pressure bulk modulus is 80.7±1.8 GPa, in accordance with the bulk modulus scaling and lattice properties of the related compound Cd3P2. A tetragonal to orthorhombic phase transformation occurs above 11 GPa with a relative volume change of−7.1%. Values for the thermal expansion coefficient are reported at 293, 200 and 100 K.