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Figure 9
Unit-cell parameters of MS9 as a function of pressure at 240 K. Open symbols correspond to data measured in a TiZr gas cell on HRPD (Series 4), whereas the filled symbol was measured in a Paris–Edinburgh press on PEARL/HiPr (Fortes et al., 2017BB31). Solid lines are least-squares fits of equation (6)[link] to all of the data, whereas the dashed red lines are fits only to the gas cell data. The fitted parameters are listed in Table 4[link]. Panel (f) summarizes the relative variation of each unit-cell parameter with pressure. (g) Principal linear compressibilities and (h) volume compressibility of MS9 at 240 K. Solid lines are derived from fitting equation (6)[link] to both the HRPD and PEARL/HiPr data, whereas the dashed lines are derived from fitting only to the HRPD gas-cell data. Symbols with error bars show the moving-average derivatives calculated from the observed unit-cell parameters. Panel (i) shows the angle between the stiffest direction in the crystal, [{\buildrel\rightharpoonup\over \beta } _3] and the c-axis.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 73| Part 1| February 2017| Pages 47-64
https://doi.org/10.1107/S2052520616018266
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