Details

Autor(en) / Beteiligte

• Sedelnikov, D.
• Pavlova, V.
• Kurenbaeva, Zh
• Efimov, N.
• Murashova, E.

Titel

Ternary intermetallic compounds R23Ru7In4 (RCe, Pr): Synthesis, crystal structure and physical properties

Ist Teil von

• Journal of solid state chemistry, 2024-09, Vol.337, p.124813, Article 124813

Ort / Verlag

Elsevier Inc

Erscheinungsjahr

2024

Quelle

ScienceDirect

Beschreibungen/Notizen

• Two novel ternary intermetallic compounds Ce23Ru7In4 and Pr23Ru7In4 were synthesized by arc melting of components and subsequent annealing at 600 °C. Both compounds crystallize in a hexagonal cell, with structure type Pr23Ir7Mg4, space group P63mc (№ 186), Pearson symbol hP68, Z = 2, the cell parameters: a = 9.861(5) Å, c = 22.520(12) Å (Ce); a = 9.9260(7) Å, c = 22.4109(2) Å (Pr). The structure of Ce23Ru7In4 was determined by single-crystal X-ray diffraction and the structure of Pr23Ru7In4 was determined by the Rietveld method using powder X-ray diffraction pattern. Compound Ce23Ru7+xIn4-x exist in the homogeneity range 0 ≤ x ≤ 3. An essential feature of compound Ce23Ru7In4 is the presence of abnormally short distances Ce–Ru (2.637 Å, 2.735 Å). The compound Pr23Ru7In4 melts incongruently and compound Ce23Ru7In4 melts congruently at temperatures 756 and 683°С respectively. The Pr23Ru7In4 compound is characterized by the presence of a magnetic transition at 12 K. The observed magnetic transition is most likely indicative of a transition to the spin glass state. Crystal structure of the compound Ce23Ru7In4, layer of Ru-centered trigonal prisms with Ce atoms at the vertices on the ab plane and Ce–Ru distances in such prisms in Å. [Display omitted] •Novel ternary intermetallic compounds R23Ru7In4 (RCe, Pr) were prepared.•Anomalously short Ce–Ru distances (2.637 Å, 2.735 Å) were found in the Ce23Ru7In4 structure.•Intermetallic compound Ce23Ru7In4 melts congruently, and compound Pr23Ru7In4 melts incongruently.•The Pr23Ru7In4 compound is characterized by the presence of a magnetic transition at 12 K.