Chemistry, asked by wahaj73, 10 months ago

why lanthanides exhibite sharp absorption bands?​

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Answered by sudhirhaldkar2980
1

Answer:

The 4f-electrons of lanthanides yield two types of transitions such as f-f and f-d transitions. The f-f transitions which give rise to sharp, narrow bands of comparatively weak intensities which are Laporte forbidden, whereas allowed f-d transitions are relatively broad and intense.

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