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Structure variations within RSi(2) and R (2) TSi(3) silicides. Part I. Structure overview
Here, structural parameters of various structure reports on RSi(2) and R (2) TSi(3) compounds [where R is an alkaline earth metal, a rare earth metal (i.e. an element of the Sc group or a lathanide), or an actinide and T is a transition metal] are summarized. The parameters comprising composition, l...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7137784/ https://www.ncbi.nlm.nih.gov/pubmed/32831221 http://dx.doi.org/10.1107/S2052520620001043 |
Sumario: | Here, structural parameters of various structure reports on RSi(2) and R (2) TSi(3) compounds [where R is an alkaline earth metal, a rare earth metal (i.e. an element of the Sc group or a lathanide), or an actinide and T is a transition metal] are summarized. The parameters comprising composition, lattice parameters a and c, ratio c/a, formula unit per unit cell and structure type are tabulated. The relationships between the underlying structure types are presented within a group–subgroup scheme (Bärnighausen diagram). Additionally, unexpectedly missing compounds within the R (2) TSi(3) compounds were examined with density functional theory and compounds that are promising candidates for synthesis are listed. Furthermore, a correlation was detected between the orthorhombic AlB(2)-like lattices of, for example, Ca(2)AgSi(3) and the divalence of R and the monovalence of T. Finally, a potential tetragonal structure with ordered Si/T sites is proposed. |
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