<br>Ba2Y0.87(1)Mn1.71(1)Te5的合成及晶体结构,Acta Crystallographica Section C

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Ba2Y0.87(1)Mn1.71(1)Te5的合成及晶体结构
Acta Crystallographica Section C ( IF 0.7 ) Pub Date : 2024-01-01 , DOI: 10.1107/s2053229623011099
Sweta Yadav ₁ , Jai Prakash ₁

Affiliation

我们报道了一种新型四元碲化物Ba ₂ Y _0.87(1) Mn _1.71(1) Te ₅的结构表征，它是通过真空密封熔融石英管内元素的直接反应合成的。第四相是 Ba– M –Mn–Te 系的第一个成员（ M = Sc 和 Y）。使用 SEM-EDX（扫描电子显微镜-能量色散 X 射线光谱法）和单晶 X 射线衍射 (SCXRD) 研究阐明了该相的组成和结构。标题相是非化学计量的，在单斜晶系（空间群C 2/ m ）中结晶，具有精炼晶胞参数a = 15.1466 (8)、 b = 4.5782 (3)、 c = 10.6060 (7) Å 和 β = 116.956 (2)°，有两个分子式单位（ Z = 2）。 Ba ₂ Y _0.87(1) Mn _1.71(1) Te ₅的准二维晶体结构由扭曲的YTe ₆八面体和MnTe ₄四面体作为结构的构建块。 YTe ₆八面体通过沿[010]方向共享边排列形成无限的一维链。这些链进一步沿c轴连接到 MnTe ₄四面体，形成层状二维聚阴离子 [Y _0.87(1) Mn _1.71(1) Te ₅ ] ⁴⁻单元。 Ba ²⁺阳离子填充在[Y _0.87(1) Mn _1.71(1) Te ₅ ] ⁴⁻阴离子层之间带来了结构的电荷中性。该结构中的每个 Ba 原子都位于由七个 Te 原子组成的扭曲单帽三棱柱状多面体的中心。

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Synthesis and crystal structure of Ba2Y0.87(1)Mn1.71(1)Te5

We report the structural characterization of a new quaternary telluride, Ba₂Y_0.87(1)Mn_1.71(1)Te₅, which was synthesized by the direct reaction of the elements inside a vacuum-sealed fused-silica tube. The quaternary phase is the first member of the Ba–M–Mn–Te system (M = Sc and Y). The composition and structure of the phase were elucidated using SEM–EDX (scanning electron microscopy–energy dispersive X-ray spectrometry) and single-crystal X-ray diffraction (SCXRD) studies. The title phase is nonstoichiometric and crystallizes in the monoclinic system (space group C2/m) having the refined unit-cell parameters a = 15.1466 (8), b = 4.5782 (3), c = 10.6060 (7) Å and β = 116.956 (2)°, with two formula units (Z = 2). The pseudo-two-dimensional crystal structure of Ba₂Y_0.87(1)Mn_1.71(1)Te₅ consists of distorted YTe₆ octahedra and MnTe₄ tetrahedra as the building blocks of the structure. The YTe₆ octahedra are arranged to form infinite one-dimensional chains by sharing edges along the [010] direction. These chains are further connected to the MnTe₄ tetrahedra along the c axis to create layered two-dimensional polyanionic [Y_0.87(1)Mn_1.71(1)Te₅]⁴⁻ units. The stuffing of Ba²⁺ cations in between the layers of [Y_0.87(1)Mn_1.71(1)Te₅]⁴⁻ anions brings the charge neutrality of the structure. Each Ba atom in the structure sits at the centre of a distorted monocapped trigonal prism-like polyhedron of seven Te atoms.

更新日期：2024-01-06

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