《Tab.1 Assignment of IR and Raman spectra in KTm0.1-Yb0.9 (WO4) 2crystal》

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《掺铥钨酸镱钾激光晶体结构模拟及振动光谱（英文）》

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It can be seen from Fig.4 that the infrared absorption peak of the crystal at 474 cm-1indicates the wagging vibration of WO4group，and the infrared absorption peaks at 636，771，840，889，926 cm-1can be attributed to the stretching vibration of WO4group.When the sample was placed in the air，some water came into the sample，so the infrared absorption peaks at 1 642 cm-1（1 469 cm-1）and3 461 cm-1are due to the bending vibration and asymmetric stretching of the O—H bond.The Raman spectrum of the crystal can be seen in Fig.5.The stronger Raman peaks at 84，109，199，346，413，681，761，802，899 cm-1and the weaker red light at 650 nm were observed，which indicates the crystal has multiple bonds with high-covalency.Tab.1 lists the vibration frequencies assignment of the crystal as for IR and Raman spectra.The results demonstrate the existence of the double oxygen bridge（WOOW）and the single oxygen bridge（WOW）in the crystal.