Refinement of the crystal structure of HoRu2Si2 (ThCr2Si2-type)

The crystal structure of HoRu₂Si₂ has been determined from single crystal X-ray counter data obtained from a single crystal specimen which was prepared from an arc melted sample heat-treated at 500° C for 4 weeks and quenched. HoRu₂Si₂ is tetragonal with space group I4/mmm, and cell parameters a=4.1552(9) and $\text{c}\text{=9.5178(68)}\text{A}\text{?}$; Z = 2. The final reliability factor $\text{R}\text{=}\text{solΣΔ}\text{F}\text{|}\text{Σ|}\text{F}{}_{\mathrm{o}}\text{|}$ is 0.052 for 97 independent reflections; $\text{|}\text{F}{}_{\mathrm{o}}\text{| > 2 б}$. HoRu₂Si₂ is isotypic with the ordered structure type of ThCr₂Si₂ (BaAl₄-derivative type).