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首页> 外文会议>NATO Advanced Study Institute on New Trends in Intercalation Compounds for Energy Storage, Sep 22-Oct 2, 2001, Sozopol, Bulgaria >INSERTION OF RARE -EARTH METALS INTO AgI -BASED COMPOUNDS. FIRST EVIDENCE OF DISORDERING AND STRONG MODIFICATION OF β- AND γ-AgI CRYSTAL STRUCTURES
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INSERTION OF RARE -EARTH METALS INTO AgI -BASED COMPOUNDS. FIRST EVIDENCE OF DISORDERING AND STRONG MODIFICATION OF β- AND γ-AgI CRYSTAL STRUCTURES

机译：将稀土金属插入基于AgI的化合物中。 β-和γ-AgI晶体结构的紊乱和强修饰的首次证据

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摘要

The rare-earth metals La, Ce, Nd, Sm, Tb, Tm, Yb, and Lu as well as Sc and Y were inserted into polycrystalline β- (γ-)AgI films for the first time under the conditions characteristic of topochemical reactions. Sm was also first inserted into films of the superionic conductor CsAg_4Br_(3-x)I_(2+x). The specific features of the obtained optical spectra were explained by the formation of F-centers, disordering of the initial crystal structures of β- (γ-)AgI, and synthesis of new non-stoichiometric phases containing La, Ce, or Sm. The optical band gap E_g in the new compounds, termed rare-earth silver halides, was determined from the position of the edge exciton and was approximately 3.7 eV at 293 K. Possible extensions of the conclusions drawn onto a large massive of AgI-based compounds varying in chemical composition and structure are proposed.
机译：在拓扑化学反应特征条件下，将稀土金属La，Ce，Nd，Sm，Tb，Tm，Yb和Lu以及Sc和Y首次插入多晶β-（γ-）AgI薄膜中。 。还先将Sm插入超离子导体CsAg_4Br_（3-x）I_（2 + x）的薄膜中。获得的光谱的特定特征通过F中心的形成，β-（γ-）AgI的初始晶体结构的无序以及包含La，Ce或Sm的新的非化学计量相的合成来解释。从边缘激子的位置确定了新化合物的光学带隙E_g（称为稀土卤化银），在293 K下约为3.7 eV。可能将结论推广到大量基于AgI的化合物上建议改变化学组成和结构。

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