Crystal structures of the alkali aluminoboracites A4B4Al3O12Cl (A = Li, Na)
| Autor: | Sho Yoshino, Hidechika Arima, Masanao Ishijima, Koichi Kajihara |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 2, Pp 169-173 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2056-9890 20569890 |
| DOI: | 10.1107/S2056989024000501 |
| Popis: | Single crystals of alkali aluminoboracites, A4B4Al3O12Cl (A = Li, Na), were grown using the self-flux method, and their isotypic cubic crystal structures were determined by single-crystal X-ray diffraction. Na4B4Al3O12Cl is the first reported sodium boracite, and its lattice parameter [13.5904 (1) Å] is the largest among the boracites consisting of a cation–oxygen framework reported so far. For both crystals, structure models refined in the cubic space group F\overline{4}3c, which assume that all cubic octant subcells in the unit cell are equivalent, converged with R1 factors of ∼0.03. However, the presence of weak hhl reflections with odd h and l values indicates that refinements in the space group F23, which presume a checkerboard-like ordering of two types of subcells with slightly different atomic positions, are more appropriate. |
| Databáze: | Directory of Open Access Journals |
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