Novel Ternary Intermetallic Compounds R4Ru2Ga3 (R = Pr,Nd, Sm, Gd, Tb, Dy, Ho, Er)

Авторы: Grekhov I.A., Kurenbaeva Zh M., Murashova E.V.
Журнал: Crystallography Reports
Том: 69
Номер: 4
Год издания: 2024
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 478
Последняя страница: 484
DOI: 10.1134/S1063774523601570
Аннотация: A number of new isostructural ternary intermetallic compounds of the composition R4Ru2Ga3(R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) were found in ternary R–Ru–Ga systems. The single-crystal X-raydiffraction study of Nd4Ru2Ga3 showed that this compound crystallizes in the monoclinic system and it is arepresentative of a new structure type (a = 10.938(6) Å, b = 4.064(2) Å, c = 9.746(5) Å,  = 111.18(2), spacegroup С2, Z = 2, R1 = 0.043, wR2 = 0.060 for 1198 reflections). The specific structural feature of this compound is the presence of distorted RuNd6 (AlB2 type) and GaNd8 (CsCl type) units. The shortest Nd–Ru distance in the polyhedron is 2.8463(16) Å, which is significantly smaller than the sum of the correspondingatomic radii. The unit cell parameters and volumes in the R4Ru2Ga3 series (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho,Er) decrease in accordance with lanthanide compression, while their melting points increase.
Добавил в систему: Мурашова Елена Викторовна

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