Preparation and crystal structure of Ni16Si9Al

Richter, Klaus W.; Prots, Yurii; Grin, Yuri

doi:10.1002/zaac.200300316

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Preparation and crystal structure of Ni₁₆Si₉Al

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Prots, Yurii
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin, Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Richter, K. W., Prots, Y., & Grin, Y. (2004). Preparation and crystal structure of Ni₁₆Si₉Al. Zeitschrift für anorganische und allgemeine Chemie, 630(3), 417-422. doi:10.1002/zaac.200300316.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-801F-C

Abstract

The new ternary phase Ni16Si9Al was synthesized from the elements. The compound is formed in a presumably peritectoid reaction at 786 °C and has a narrow homogeneity range around the nominal composition. It adopts an orthorhombic structure (space group Cmcm) related to Ni3Si2. It was found, that one particular position is occupied by aluminum together with silicon causing slight splitting and thus leading to a local symmetry break in the structure. Both, Ni16Si9Al and Ni3Si2, show related structural motifs and can be described by a combination of flat layers and puckered slabs with interatomic distances indicating covalent interactions between the atoms.