The P–V–T equation of state of D₂O ice VI determined by neutron powder diffraction in the range 0 < P < 2.6 GPa and 120 < T < 330 K, and the isothermal equation of state of D₂O ice VII from 2 to 7 GPa at room temperature

Ice VI is an important rock-forming mineral phase in icy planetary bodies; the pressure and temperature dependence of its density have been measured using powder neutron diffraction, throughout the high-pressure stability field, to obtain an accurate equation of state parameterization. These data are used to derive other thermodynamic quantities of use in planetary modelling.

A compact, transportable, thermoelectrically cooled cold stage for reflection geometry X-ray powder diffraction

A thermoelectrically cooled sample stage for X-ray powder diffraction in the range from about 250 to 300 K is described. The stage is constructed in such a way that it may be removed from the diffractometer and pre-cooled to its base temperature before the sample is loaded.