Rare earth ruthenium gallides with the high content of gallium LaRu2Ga3, R2Ru5Ga9 (RSm, Gd–Er) and R5Ru8Ga12 (RHo, Er)

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-05-20 DOI:10.1016/j.jssc.2025.125442

I. Grekhov, Y. Grishina, Zh Kurenbaeva, E. Murashova

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Abstract

Compounds of the compositions LaRu₂Ga₃, R₂Ru₅Ga₉, and R₅Ru₈Ga₁₂ were obtained close to the composition of RRu₂Ga₃ in the R–Ru–Ga systems (RLa, Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er). The compound LaRu₂Ga₃ crystallizes in its own structural type, R₂Ru₅Ga₉ (RSm, Gd–Er) crystallizes in the structural type Sm₂Ru₅Ga₉, and R₅Ru₈Ga₁₂ (RHo, Er) crystallizes in a structural type derived from Sc₅Re₈Si₁₂. The crystal structure of LaRu₂Ga₃ is determined on a single crystal: a = 12.0750(12) Å, b = 5.8276(6) Å, c = 6.2391(6) Å, V = 439.03(8) Å³, Z = 4, space group Pnma. No new phases were found in samples with RPr, Nd. The crystal structure of R₂Ru₅Ga₉ was determined on a single crystal of one of the representatives of the series – Dy₂Ru₅Ga₉: a = 6.1356(11) Å, c = 13.429(3) Å, V = 505.5(2) Å³, Z = 2, space group I4/mmm. The Ho₅Ru₈Ga₁₂ single crystal was used to determine the crystal structure: a = 15.332(2) Å, b = 20.019(3) Å, c = 5.4725(8) Å, V = 1679.7(4) Å³, Z = 4, space group Fmm2. Melting occurs congruently for all investigated compounds. It was not possible to obtain single phase samples for the determination of magnetic and electrically conductive properties.

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高含量的稀土钌镓LaRu2Ga3、R2Ru5Ga9 （RSm, Gd-Er）和R5Ru8Ga12 （RHo, Er）

在R-Ru-Ga体系（RLa、Pr、Nd、Sm、Gd、Tb、Dy、Ho和Er）中，得到了与RRu2Ga3、R2Ru5Ga9和R5Ru8Ga12组成相近的化合物。化合物LaRu2Ga3结晶为自身结构类型，R2Ru5Ga9 （RSm, Gd-Er）结晶为Sm2Ru5Ga9结构类型，R5Ru8Ga12 （RHo, Er）结晶为Sc5Re8Si12衍生的结构类型。LaRu2Ga3的晶体结构在单晶上确定：a = 12.0750（12） Å， b = 5.8276(6) Å， c = 6.2391(6) Å， V = 439.03(8) Å3, Z = 4，空间群Pnma。在含有RPr、Nd的样品中未发现新的相。R2Ru5Ga9的晶体结构是在该系列代表之一的Dy2Ru5Ga9的单晶上确定的：a = 6.1356（11） Å， c = 13.429(3) Å， V = 505.5(2) Å3, Z = 2，空间群I4/mmm。用Ho5Ru8Ga12单晶测定晶体结构：a = 15.332(2) Å， b = 20.019(3) Å， c = 5.4725(8) Å， V = 1679.7(4) Å3, Z = 4，空间群Fmm2。所有被研究的化合物都一致地发生熔化。不可能获得单相样品来测定磁性和导电性。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.