Figure 14
The gradual development of the diffractions h1l during cooling at (a) 230, (b) 225, (c) 220, (d 215, (e) 210, (f) 205, (g) 200, (h) 195 and (i) 190 K in (II). (The indices h1l are related to the unit cell of the low-temperature phase; diffractions from a parasitic crystal are also present.) The onset of the diffractions h1l takes place at about 200 K. |