caa a22 4500 467927375 CHVBK 20180406152933.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1134/S0020168506050153 doi (NATIONALLICENCE)springer-10.1134/S0020168506050153 Synthesis of the LnNb7O12 (Ln [Elektronische Daten] La, Ce, Pr) Discrete-cluster compounds [O. Reznitskikh, V. Zubkov, N. Lobachevskaya, A. Tyutyunnik, V. Bamburov] The new compounds CeNb7O12 and PrNb7O12, isostructural with LaNb7O12, have been synthesized and characterized by x-ray diffraction. The structures of the LnNb7O12 (Ln = La, Ce, Pr) compounds have space group P21/c (Z = 4), with lattice parameters a = 10.764(2), 10.743(2), 10.738(4) Å; b = 9.192(2), 9.146(2), 9.137(3) Å; c = 10.313(2), 10.304(2), 10.303(3) Å; and β = 104.25(2)°, 104.31(2)°, and 104.21(3)°, respectively. The reduction in the lattice parameters of LnNb7O12 in going from La to Pr correlates with the ionic radii of Ln: r(La3+) > r(Ce3+) > r(Pr3+). In the Nd(Sm)-Nb-O systems, phases of stoichiometry LnNb7O12 have not been obtained. Pleiades Publishing, Inc., 2006 Reznitskikh O. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut Zubkov V. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut Lobachevskaya N. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut Tyutyunnik A. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut Bamburov V. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut Inorganic Materials Nauka/Interperiodica 42/5(2006-05-01), 532-536 0020-1685 42:5<532 2006 42 10789 https://doi.org/10.1134/S0020168506050153 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0020168506050153 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reznitskikh O. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Zubkov V. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Lobachevskaya N. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Tyutyunnik A. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Bamburov V. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, 620219, Yekaterinburg, Russia aut NATIONALLICENCE 773 0- Inorganic Materials Nauka/Interperiodica 42/5(2006-05-01), 532-536 0020-1685 42:5<532 2006 42 10789 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer