We present an extended research on characterization of the ground state in a polycrystalline compound Ce₂Ir₃Al₉ using powder x-ray diffraction, magnetic susceptibility χ(T), isothermal magnetization M(B), specific heat C_p(T), electrical resistivity ρ(T), magnetoresistivity ρ(B), thermoelectric power S(T) and thermal conductivity κ(T) measurements, together with a theoretical description of the obtained data to develop a more profound understanding of the physics in this compound. Ce₂Ir₃Al₉ crystallizes in the orthorhombic Y₂Co₃Ga₉-type of structure (space group Cmcm, No. 63, oC56, Z = 4). The χ(T) and C _p(T)/T data reveal the signatures of intermediate valence behaviour on Ce ions with the approximate value of the Kondo temperature T _K = 96 K and the Sommerfeld coefficient γ = 31 mJ/mol ⋅ K². In contrast to the magnetometric and thermodynamic measurements, the transport data (ρ(T) and S(T)) indicate the development of the Kondo lattice state. Accordingly, we expect that for Ce₂Ir₃Al₉ the most likely scenario, which develops in a wide T range is the coexistence and competition of two energy scales of interactions between conduction electrons and 4f spins on Ce ions, located in one unique crystallographic site in the unit cell, in consequence carrying out our system from Ce⁴⁺$\overrightarrow{Temp.}$ Ce³⁺. At higher temperatures, where the Kondo interaction becomes dominant the influence of the crystal electric field effect seems to play an influential role in the ground state of this compound too.

我们使用粉末 X 射线衍射、磁化率χ ( T )、等温磁化强度M ( B )、比热C _p ( T )_对多晶化合物 Ce ₂ Ir ₃ Al ₉的基态表征进行了扩展研究，电阻率ρ ( T )、磁阻率ρ ( B )、热电功率S ( T ) 和热导率κ ( T) 测量，以及对所获得数据的理论描述，以更深入地了解该化合物的物理学。Ce ₂ Ir ₃ Al ₉以斜方晶Y ₂ Co ₃ Ga ₉型结构（空间群Cmcm，No.63，oC 56，Z =4）结晶。在χ（Ť）和Ç _p（Ť）/ Ť数据揭示的中间价行为上的Ce离子的签名与近藤温度的近似值Ť _ķ= 96 K 和 Sommerfeld 系数γ = 31 mJ/mol ⋅ K ²。与磁力测量和热力学测量相反，传输数据（ρ ( T ) 和S ( T )）表明 Kondo 晶格状态的发展。因此，我们预计，对于 Ce ₂ Ir ₃ Al _{9 来说}，最可能的情况是在宽T范围内发展的最可能的情况是传导电子和Ce 离子上的4 f自旋之间相互作用的两个能量尺度的共存和竞争，位于一个独特的晶胞中的晶体学位点，因此从 Ce 实施我们的系统⁴⁺$\overrightarrow{吨\mathrm{电子}米磷.}$铈³⁺。在更高的温度下，近藤相互作用变得占主导地位，晶体电场效应的影响似乎也在该化合物的基态中发挥了重要作用。