 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 9]](bk0150fig9mag.jpg)
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Figure 9
TTF⋯CA – the temperature and pressure dependence of the cell dimensions of TTF-CA (values for [001] were given only for the temperature range shown); β is 99.1° at 300 K and 98.6° at 50 K (both at 1 bar). These (and other) results show that there is a neutral (N) to ionic (I) phase transition on cooling. This is first order at 1 bar, but appears to change towards second order as the pressure increases to 5 kbar. It is shown later that cell dimension values between 7.54 and 7.58 Å on the [010] 1 bar curve are artifacts; this probably also holds for [001] between 14.485 and 14.500 Å. This figure is taken from Figs. 5, 6 and 4(c) of Le Cointe (1994  ). The 1 bar curves are given in Fig. 3 of Le Cointe, Lemée-Cailleau et al. (1995). |
![[Figure 9]](bk0150fig9.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
