| Abstract: | Thermal expansion of the monoclinic nonlinear optical crystal BiB3O6 (bismuth triborate) was measured by dilatometry within the temperature range from 173 K to 573 K using single crystal samples of dimensions ∼7 x 7 x 8 mm3. The four independent tensor coefficients are given and the calculated loci of zero thermal expansion of BiB3O6 are related to the loci of phase matching for second harmonic generation. Characteristic features of the crystal structure are taken to discuss the marked anisotropy of thermal expansion of BiB3O6. |
