Y. Tyvanchuk, V. Svitlyk, Mykola Pustovoychenko, Y. Kalychak
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引用次数: 1
摘要
摘要采用电弧熔炼法制备了Sm4Ni11In20多晶。随后的高温处理用于单晶生长。Sm4Ni11In20晶体结构(U4Ni11Ga20型;单晶同步辐射x射线衍射测定了2014年I > 2σ(I)独立反射的C2/m, a = 22.5457(3) Å， b = 4.34929(5) Å， c = 16.5479(2) Å， β = 124.592(2)°，R1 = 0.0358, wR2 = 0.0934。Sm4Ni11In20扩展了R4Ni11In20 (R = Y, Gd, Tb, Dy, Ho)系列相。R4Ni11In20和RNi3In6 (LaNi3In6型;R = La, Ce, Pr, Nd, Eu)系列具有相似的成分。它们的结构有相似的片段;稀土原子配位多面体是带有附加原子的五角形多面体。
The crystal structure of Sm4Ni11In20 and its relation to other indium-rich compounds
AbstractPolycrystalline Sm4Ni11In20 was obtained by arc-melting of metal ingots. A subsequent high temperature treatment was used for single crystal growth. The Sm4Ni11In20 crystal structure (U4Ni11Ga20 type; C2/m, a = 22.5457(3) Å, b = 4.34929(5) Å, c = 16.5479(2) Å, β = 124.592(2)°, R1 = 0.0358, wR2 = 0.0934) was determined by single crystal synchrotron radiation X-ray diffraction from 2014 independent reflections with I > 2σ(I). Sm4Ni11In20 extends the R4Ni11In20 (R = Y, Gd, Tb, Dy, Ho) series of phases. The R4Ni11In20 and RNi3In6 (LaNi3In6 type; R = La, Ce, Pr, Nd, Eu) series have similar compositions. Their structures share similar fragments; in particular the rare earth atom coordination polyhedra are pentagonal prisms with additional atoms.
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