The crystal structure of the new phase Er 0.85 Co 4.31 Si was determined by single-crystal X-ray diffraction (46 unique reflections, R1 = 0.0378, wR2 = 0.0697). The compound crystallizes in the TbCu 7 structure type: space group P6/mmm, hP8-1.85, with lattice parameters a = 4.8593(19), c = 3.9869(16) Å. A full investigation of the crystal structure was also performed for the known phase CoSi on single-crystal X-ray diffraction data (61 unique reflections, R1 = 0.0256, wR2 = 0.0548). CoSi crystallizes in the FeSi structure type: space group P2 1 3, cP8, with lattice parameter a = 4.4500(5) Å.
Key indicatorsSingle-crystal X-ray study T = 295 K Mean (Ni-Si) = 0.001 Å R factor = 0.025 wR factor = 0.057 Data-to-parameter ratio = 15.6For details of how these key indicators were automatically derived from the article, see
Single crystals of erbium dicobalt disilicide were synthesized from the corresponding elements by arc melting. The ternary intermetallic compound crystallizes in the body‐centred tetragonal space group I4/mmm and adopts the CeGa2Al2 structure type, with all atoms in special positions.
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