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Infrared Activity of KAI(MoO4)2 and NaAl(MoO4)2

✍ Scribed by M. Maczka; J. Hanuza; E.T.G. Lutz; J.H. van der Maas

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
162 KB
Volume
145
Category
Article
ISSN
0022-4596

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✦ Synopsis

We have investigated the infrared activity of phonons in monoclinic, pseudo-trigonal NaAl(MoO 4 ) 2 performing polarized re-6ectivity in the range 1200+700 cm ؊1 and IR absorption measurements of polycrystalline samples in the 1200+30 cm ؊1 region. To identify all modes predicted by group theory arguments, we compare the recorded spectra with similar measurements performed on trigonal KAl(MoO 4 ) 2 . The obtained results allow us to propose the assignment of all observed bands to the respective vibrational modes. Our results suggest that the ambient temperature structure of NaAl(MoO 4 ) 2 may be described by the space group C2/c.

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