The equiatomic indide ScPtIn (ZrNiAl type, space group P 6‾$‾{6}$2 m ) shows an extended solid solution Sc 3 Pt 3–x In 3 . Several samples of the Sc 3 Pt 3–x In 3 series were synthesized from the elements by arc-melting and subsequent annealing, or directly in a high frequency furnace. The lowest platinum content was observed for Sc 3 Pt 2.072(3) In 3 . All samples were characterized by powder X-ray diffraction and their lattice parameters and several single crystals were studied on the basis of precise single crystal X-ray diffractometer data. The correct platinum occupancy parameters were refined from the diffraction data. Decreasing platinum content leads to decreasing a and c lattice parameters. Satellite reflections were observed for the Sc 3 Pt 3–x In 3 crystals with x = 0.31–0.83. These satellite reflections could be described with a modulation vector (13,13,γ)$\left(\frac{1}{3},\frac{1}{3},\gamma \right)$ (γ=12$\gamma =\frac{1}{2}$ c * for all crystals) and are compatible with trigonal symmetry. The interplay of platinum filled vs. empty In 6 trigonal prisms is discussed for an approximant structure with space group P 3 m 1.

中文翻译：

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固溶体Sc3Pt3-xIn3（x = 0–0.93）中的上层结构形成

等原子的In ScPtIn（ZrNiAl型，空间群P 6‾ $＆＃x203e; {6} $ 2 m）显示了扩展的固溶体Sc 3 Pt 3–x In 3。通过电弧熔化和随后的退火，或直接在高频炉中，由元素合成了一些Sc 3 Pt 3–x In 3系列样品。对于Sc 3 Pt 2.072（3）In 3，观察到最低的铂含量。所有样品均通过粉末X射线衍射进行表征，并根据精确的单晶X射线衍射仪数据研究了其晶格参数和几种单晶。从衍射数据中提炼出正确的铂占有参数。铂含量的降低导致a和c晶格参数的降低。观测到Sc 3 Pt 3–x In 3晶体的卫星反射，x = 0.31–0.83。这些卫星反射可以用调制矢量（13,13，γ）$ \ left（\ frac {1} {3}，\ frac {1} {3}，\ gamma \ right）$（γ= 12 $ \ gamma = \ frac {1} {2} $ c *（对于所有晶体），并且与三角对称性兼容。对于空间群为P 3 m 1的近似结构，讨论了填充的铂与空的In 6三角棱镜之间的相互作用。