首页> 外文期刊>Journal of Solid State Chemistry >Rare-earth metal gallium silicides via the gallium self-flux method. Synthesis, crystal structures, and magnetic properties of RE(Ga _(1-x)Si_x)_2 (RE=Y, La-Nd, Sm, Gd-Yb, Lu)
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Rare-earth metal gallium silicides via the gallium self-flux method. Synthesis, crystal structures, and magnetic properties of RE(Ga _(1-x)Si_x)_2 (RE=Y, La-Nd, Sm, Gd-Yb, Lu)

机译:通过镓自熔法制备稀土金属镓硅化物。 RE(Ga _(1-x)Si_x)_2(RE = Y,La-Nd,Sm,Gd-Yb,Lu)的合成,晶体结构和磁性能

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摘要

Fifteen ternary rare-earth metal gallium silicides have been synthesized using molten Ga as a molten flux. They have been structurally characterized by single-crystal and powder X-ray diffraction to form with three different structures - the early to mid-late rare-earth metals RE=La-Nd, Sm, Gd-Ho, Yb and Y form compounds with empirical formulae RE(Ga_xSi _(1-x))_2 (0.38≤x≤0.63), which crystallize with the tetragonal α-ThSi_2 structure type (space group I4 _1/amd, No. 141; Pearson symbol tI12). The compounds of the late rare-earth crystallize with the orthorhombic α-GdSi_2 structure type (space group Imma, No. 74; Pearson symbol oI12), with refined empirical formula REGa_xSi_(2-x-y) (RE=Ho, Er, Tm; 0.33≤x≤0.40, 0.10≤y≤0.18). LuGa_(0.32(1))Si_(1.43(1)) crystallizes with the orthorhombic YbMn_(0.17)Si_(1.83) structure type (space group Cmcm, No. 63; Pearson symbol oC24). Structural trends are reviewed and analyzed; the magnetic susceptibilities of the grown single-crystals are presented.
机译:使用熔融的Ga作为熔融助熔剂合成了十五种三元稀土金属镓硅化物。它们在结构上已通过单晶和粉末X射线衍射表征为具有三种不同结构的形式-早期至中晚期稀土金属RE = La-Nd,Sm,Gd-Ho,Yb和Y形成与经验公式RE(Ga_xSi _(1-x))_ 2(0.38≤x≤0.63),它们以四方α-ThSi_2结构类型(空间群I4 _1 / amd,编号141; Pearson符号tI12)结晶。晚稀土化合物的结晶为正交晶系的α-GdSi_2结构类型(空间群Imma,编号74; Pearson符号oI12),具有精确的经验公式REGa_xSi_(2-xy)(RE = Ho,Er,Tm; 0.33≤x≤0.40,0.10≤y≤0.18)。 LuGa_(0.32(1))Si_(1.43(1))结晶为正交晶系YbMn_(0.17)Si_(1.83)结构类型(空间群Cmcm,No.63; Pearson符号oC24)。审查和分析结构趋势;给出了生长的单晶的磁化率。

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