Synthesis and Crystal Structure of New Ce–Ru–Ga Ternary Intermetallic Phases with Known Structure Types


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Five new intermetallic phases of known structure types have been identified in a systematic study of the Ce–Ru–Ga system: CeRu0.90Ga1.10 (MgZn2 structure, sp. gr. Р63/mmc, а = 5.44503(5) Å, с = 8.67188(13) Å, very narrow homogeneity range), Ce7Ru6Ga7 (Pr7Co6Al7 structure, constant composition, sp. gr. Р4/mbm, а = 13.61910(17) Å, с = 4.34957(5) Å), Ce6Ru0.18Ga2.82 (K2UF6-derived structure, sp. gr. P\(\bar {6}\)2m, a = 8.09628(19) Å, c = 4.38470(13) Å), Ce23Ru10Ga (Pr23Ir7Mg4 structure, sp. gr. P63mc, а = 9.867(6) Å, с = 22.153(14) Å) and Ce26(Ru0.59Ga0.41)17 (Sm26(Co0.65Ga0.35)17 structure, sp. gr. P4/mbm, a = 11.9529(4) Å, c = 15.0135(10) Å). In the structures of Ce7Ru6Ga7, Ce23Ru10Ga, and Ce26(Ru0.59Ga0.41)17, some of the Ce atoms form very short Ce–Ru bonds (2.525(3), 2.549(5), and 2.506(2) Å, respectively), which is attributable to their intermediate valence state.

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E. Murashova

Moscow State University

编辑信件的主要联系方式.
Email: lena1960murashova@gmail.com
俄罗斯联邦, Moscow, 119991

Zh. Kurenbaeva

Moscow State University

Email: lena1960murashova@gmail.com
俄罗斯联邦, Moscow, 119991

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