Normal coordinate analysis of lanthanoide oxychlorides and oxybromides with Matlockite-type structure |
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| Affiliation: | 1. School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia;2. Department of Pure and Industrial Chemistry, Bayero University, P.M.B. 3011, Kano, Nigeria;1. Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China;2. Linnan College, Sun Yat-Sen University, Guangzhou 510275, China;3. State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China;1. Department of Chemistry, Texas A&M University, College Station, TX 77843-3012, United States;2. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3012, United States;1. Department of Physics, Box 339, University of the Free State, Bloemfontein, 9300, South Africa;2. Department of Physics, Box 321, University of Khartoum, Omdurman, 11115, Sudan;1. NUVIA a.s., Modrinova 1094, 67401, Trebic, Czech Republic;2. NBC Defence Institute, University of Defence, V. Nejedleho 692, 68201, Vyskov, Czech Republic;1. Frontier Institute of Science and Technology jointly with College of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an Shaanxi Province 710049, China;2. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;3. Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 80721, USA |
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| Abstract: | A normal coordinate and force constant calculation was carried out for lanthanoid oxyhalogenides LnOX with Ln = La, Pr, Nd, Sm, Eu and X = Cl, Br on the basis of a modified valence force field by fitting in the frequencies of the i.r. active vibrations. From the obtained force constants frequencies of the Raman-active lattice vibrations are calculated and compared with experimental determined frequencies. |
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