Figure 2
Unit-cell parameters of the pure lead phosphate (Angel & Bismayer, 1999) as solid symbols and Ba-doped material as open symbols, as determined by single-crystal X-ray diffraction. The solid lines are the extrapolation of the trends of the unit-cell parameters of the Ba-doped trigonal phase, transformed to the monoclinic cell setting. Data for the trigonal phase extend to higher pressures than shown (see Table 1). Uncertainties are smaller than the symbol sizes. |