Rich coordination of Nd3+ in Mg2Nd13(BO3)8(SiO4)4(OH)3, derived from high-pressure/high-temperature conditions |
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Authors: | Wu Shijun Kegler Philip Wang Shuao Holzheid Astrid Depmeier Wulf Malcherek Thomas Alekseev Evgeny V Albrecht-Schmitt Thomas E |
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Institution: | Institut für Geowissenschaften, Universit?t zu Kiel, 24118 Kiel, Germany. |
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Abstract: | A neodymium borosilicate, Mg(2)Nd(13)(BO(3))(8)(SiO(4))(4)(OH)(3) (MgNdBSi-1), was obtained from a high-temperature (1400 °C), solid-state reaction under high-pressure conditions (4.5 GPa). MgNdBSi-1 contains six different types of Nd(3+) coordination environments with three different ligands: BO(3), SiO(4), and OH groups. Mg(2+) cations are only bond to BO(3) groups and form porous two-dimensional layers based on 12-membered ring fragments. Surprisingly, the OH groups are retained at high temperature and reside at the center of Mg-BO(3) rings. |
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