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(Color online) Powder XRD patterns of and . The dotted lines are drawn as guides to the eyes.
(Color online) Micro-Raman spectra of and . The dashed lines are drawn as guides to the eyes.
Phonon vibrational frequencies and their assignments of and (according to Refs. 13–19) [The symbol “” means higher-order Raman vibrational modes. Besides, the weak vibrations at around (No. 20) and (No. 21) are assigned to the acoustic-phonon branch at the zone boundary and the localized vibration of the Zn atoms, respectively (Refs. 16 and 17).]
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