Raman Scattering Modification Induced by Structural Change in Alumina Polymorphs

【摘要】 The calculated Raman spectra disclose that alumina polymorphs of nordstrandite,gibbsite,diaspore,boehmite,bayerite and α-Al₂O₃ display different phonon behaviors,which can be attributed to their internal crystal structure changes.The strongest Raman peaks of nordstrandite,gibbsite,diaspore,boehmite,bayerite and α-Al₂O₃are located at 214.2cm^-1,3314.4cm^-1,2298.6cm^-1,747.7cm^-1,3484.6cm^-1 and 529.2cm^-1,respectively.The characterizations in Raman spectra of those polymorphs are obviously different,which can be used in fingerprints to identify the alumina polymorphs structure.更多还原

【Abstract】 The calculated Raman spectra disclose that alumina polymorphs of nordstrandite,gibbsite,diaspore,boehmite,bayerite and α-Al₂O₃ display different phonon behaviors,which can be attributed to their internal crystal structure changes.The strongest Raman peaks of nordstrandite,gibbsite,diaspore,boehmite,bayerite and α-Al₂O₃are located at 214.2cm^-1,3314.4cm^-1,2298.6cm^-1,747.7cm^-1,3484.6cm^-1 and 529.2cm^-1,respectively.The characterizations in Raman spectra of those polymorphs are obviously different,which can be used in fingerprints to identify the alumina polymorphs structure.更多还原