Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)

The title compound, Ca(2+x)Nd(8–x)(SiO(4))(6)O(2–0.5x) (x = 0.49), was synthesized at 1873 K and rapidly quenched to room temperature. Its structure has been determined using single-crystal X-ray diffraction and compared with results reported using neutron and X-ray powder diffraction from samples p...

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Autores principales: Le, Thu Hoai, Brooks, Neil R., Binnemans, Koen, Blanpain, Bart, Guo, Muxing, Van Meervelt, Luc
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2016
Materias:
Research Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770985/
https://www.ncbi.nlm.nih.gov/pubmed/26958389
http://dx.doi.org/10.1107/S205698901600089X
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author Le, Thu Hoai
Brooks, Neil R.
Binnemans, Koen
Blanpain, Bart
Guo, Muxing
Van Meervelt, Luc
author_facet Le, Thu Hoai
Brooks, Neil R.
Binnemans, Koen
Blanpain, Bart
Guo, Muxing
Van Meervelt, Luc
author_sort Le, Thu Hoai
collection PubMed
description The title compound, Ca(2+x)Nd(8–x)(SiO(4))(6)O(2–0.5x) (x = 0.49), was synthesized at 1873 K and rapidly quenched to room temperature. Its structure has been determined using single-crystal X-ray diffraction and compared with results reported using neutron and X-ray powder diffraction from samples prepared by slow cooling. The single-crystal structure from room temperature data was found to belong to the space group P6(3)/m and has the composition Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75) [dicalcium octa­neodymium hexa­kis­(ortho­silicate) dioxide], being isotypic with natural apatite and the previously reported Ca(2)Nd(8)(SiO(4))(6)O(2) and Ca(2.2)Nd(7.8)(SiO(4))(6)O(1.9). The solubility limit of calcium in the equilibrium state at 1873 K was found to occur at a composition of Ca(2+x)Nd(8–x)(SiO(4))(6)O(2–0.5x), where x = 0.49.
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spelling pubmed-47709852016-03-08 Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75) Le, Thu Hoai Brooks, Neil R. Binnemans, Koen Blanpain, Bart Guo, Muxing Van Meervelt, Luc Acta Crystallogr E Crystallogr Commun Research Communications The title compound, Ca(2+x)Nd(8–x)(SiO(4))(6)O(2–0.5x) (x = 0.49), was synthesized at 1873 K and rapidly quenched to room temperature. Its structure has been determined using single-crystal X-ray diffraction and compared with results reported using neutron and X-ray powder diffraction from samples prepared by slow cooling. The single-crystal structure from room temperature data was found to belong to the space group P6(3)/m and has the composition Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75) [dicalcium octa­neodymium hexa­kis­(ortho­silicate) dioxide], being isotypic with natural apatite and the previously reported Ca(2)Nd(8)(SiO(4))(6)O(2) and Ca(2.2)Nd(7.8)(SiO(4))(6)O(1.9). The solubility limit of calcium in the equilibrium state at 1873 K was found to occur at a composition of Ca(2+x)Nd(8–x)(SiO(4))(6)O(2–0.5x), where x = 0.49. International Union of Crystallography 2016-01-20 /pmc/articles/PMC4770985/ /pubmed/26958389 http://dx.doi.org/10.1107/S205698901600089X Text en © Le et al. 2016 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Research Communications
Le, Thu Hoai
Brooks, Neil R.
Binnemans, Koen
Blanpain, Bart
Guo, Muxing
Van Meervelt, Luc
Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title_full Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title_fullStr Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title_full_unstemmed Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title_short Crystal structure of apatite type Ca(2.49)Nd(7.51)(SiO(4))(6)O(1.75)
title_sort crystal structure of apatite type ca(2.49)nd(7.51)(sio(4))(6)o(1.75)
topic Research Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770985/
https://www.ncbi.nlm.nih.gov/pubmed/26958389
http://dx.doi.org/10.1107/S205698901600089X
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