To develop their previous results, the authors demonstrated that the structural-type phases Th2Ni17 and Th2Zn17 may be represented as the densest helical packing of tetrablock chains as linear 7-vertex unions of four tetrahedrons over faces. It was concluded that the tetrablock can be used as a universal building unit, including more complex structural types of Frank–Kasper phases than those considered in our previous works.
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This work was supported by the Russian Foundation for Basic Research (grant No. 19-02-00085). The symmetry regularities in the structure of close-packed tetrahedral structures were established with the support of the Ministry of Science and Higher Education of the Russian Federation using the electronic scientific resources of the A. N. Nesmeyanov Institute of Elementorganic Compounds of the Russian Academy of Sciences (construction of structural models as geometric implementations of mathematical constructions) and N. E. Bauman Moscow State Technical University (comparison of models with experimental data and computer simulation).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 47 – 51, June, 2022.
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Talis, A.L., Kraposhin, V.S. & Everstov, A.A. Assembly of Structural-Type R2T17 from a Universal Building Unit. Met Sci Heat Treat 64, 338–342 (2022). https://doi.org/10.1007/s11041-022-00811-z
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DOI: https://doi.org/10.1007/s11041-022-00811-z