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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Er3O2F5: An erbium oxide fluoride with vernier-type structure
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Er3O2F5: An erbium oxide fluoride with vernier-type structure

机译：Er3O2F5：具有游标型结构的氟化oxide

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摘要

Attempts to synthesize multinary erbium-trifluoride derivatives (e. a Er3F[Si3O10], Er4F2[Si2O7][SiO4], CsEr2F7, and RbEr3F10) from mixtures of ErOF-contaminated erbium trifluoride (ErF3) itself and appropriate other components (such as Er,03 and SiO2 or CsF and RbF. respectively) frequently resulted in the formation of pale pink, transparent, lath-shaped single crystals of Er3O2F5 (orthorhombic, Pnma; a = 562.48(5), b = 1710.16(14) c = 537.43(4) pm,- Z = 4) as by-product, typically after seven days at 800 degrees C and regardless of the applied reaction-container material (evacuated torch-sealed silica or silica-jacketed arc-welded tantalum capsules). Its crystal structure, often described as a vernier-type arranuement consisting of two interpenetrating and almost misfitting lattices (ErOF and ErF3) contains two crystal lographically different Er3+ cations in the eight- and seven-plus-one- fold anionic coordination of bicapped trigonal prisms. Whereas (Erl)(3+) carries four O2- and F- anions each, (Er2)(3+) resides in the neighbourhood of only two O2-, but five plus one F- anions. As the main structural feature, however, one can consider O2- -centred (Er3+)(4) tetrahedra which share common edges to form linear double strands of the composition (1)(infinity)[O2Er3](5+)} (d(O2- -Er3+) = 220 - 234 pm, CN = 4). Running parallel to the [100] direction and assembling like a hexagonal closest rod-packing, their electroneutralization and three-dimensional interconnection is achieved by three crystallographically independent F- anions (d(F- - Er (3+)) = 221 251 plus 281 pm) in three- and two-phis-two-fold coordination of the Er3+ cations, respectively
机译：尝试从被ErOF污染的三氟化（ErF3）本身和适当的其他成分（例如Er3F ，03和SiO2或CsF和RbF。）经常导致形成浅粉红色，透明的板条形Er3O2F5单晶（斜方晶系，Pnma; a = 562.48（5），b = 1710.16（14）c = 537.43 （4）pm，-Z = 4）作为副产物，通常在800摄氏度下放置7天后，无论使用何种反应容器材料（真空割炬密封的二氧化硅或带二氧化硅套壳的电弧焊接钽囊）。它的晶体结构通常被描述为游标型排列，由两个互相渗透且几乎不匹配的晶格（ErOF和ErF3）组成，在二元和三棱柱三棱柱的八和七倍以上阴离子配位中包含两个晶体学上不同的Er3 +阳离子。 。 （Er1）（3+）各自携带4个O2-和F-阴离子，（Er2）（3+）仅驻留在2个O2-和5个加1个F-阴离子的附近。但是，作为主要结构特征，可以考虑O2-中心（Er3 +）（4）四面体，它们共享共同的边缘以形成组成（1）（无限）[O2Er3]（5+）}（d （O 2--Er 3+）= 220-234 pm，CN = 4）。平行于[100]方向延伸并像六角形最紧密的杆堆积一样组装，它们的电子中和和三维互连是通过三个晶体学独立的F-阴离子（d（F--Er（3+））= 221251 plus 281 pm）分别对Er3 +阳离子进行3和2 phis两倍配位

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