Choosing systems of ionic radii for crystal-chemical laws in lanthanide oxobromotungstates |
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| Authors: | N. N. Lobanov N. U. Venskovskii |
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| Affiliation: | (1) Russian University of Peoples’ Friendship, ul. Miklukho-Maklaya 6, Moscow, 117198, Russia |
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| Abstract: | The unit cell parameters in LnWO4Br compounds (Ln = La, Pr, Nd, Sm, Eu, Gd, Dy, Er, or Yb) are studied as functions of ionic radii in various systems. The best systems of ionic radii for the description of crystal-chemical laws in lanthanide oxobromotungstates are determined. Crystal-chemical plots are constructed for the unit cell parameters versus lanthanide ionic radius for the specified compounds, as well as the plot of the parameter c′ for the monoclinic crystal system that accounts for the monoclinic angle β. |
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