Figure 3
Electron diffraction of Ca2Co0.9Zn0.1Si2O7 with changes in temperature: (a) incommensurately modulated structure at 297 K with the modulation vectors q1 and q2; (b) extension of the Bragg reflections along the 〈110〉 directions around 168 K, indicating the coexistence of crystal domains still in the incommensurate state, and of domains already transformed into the commensurate lock-in phase; (c) (near-) commensurate lock-in structure at 91 K (α = 0.328). |