Abstract

Introduction of the citric acid in the borate system generates a new phase, Ca[B(C6H6O7)2](H2O)4⋅HCl, which is transparent from 195nm to near infrared region. Single crystals of Ca[B(C6H6O7)2](H2O)4⋅HCl with dimensions up to 7×5×2mm3 were successfully grown by slow evaporation method at room temperature. It has been characterized by single crystal X-ray diffraction, infrared spectroscopy measure and thermogravimetric analysis. Ca[B(C6H6O7)2](H2O)4⋅HCl crystallizes in the triclinic space group P−1, with a=6.3243(18)Å, b=8.365(2)Å, c=19.042(5)Å, α=97.291(3)°, β=94.535(4)°, γ=94.165(4)°. It exhibits a unique layered structure, the layers are parallel arrangement of the (001) plane and stack along the c-axis.

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