Abstract

The stress-birefringence constants of synthetic periclase have been measured by the photometric-integration technique. The measured results for the difference constants are q₁₁₁₁-q₁₁₂₂ = −1.25×10⁻¹³ cm² dyne⁻¹ and 2q₁₂₁₂ = −0.66×10⁻¹³ cm² dyne⁻¹. The absolute constants were determined by the prism deviation method: the values are q₁₁₁₁ = −0.9×10⁻¹³ cm² dyne⁻¹ and q₁₁₂₂ = 0.3×10⁻¹³ cm² dyne⁻¹. The dispersion of the difference constants throughout the visible spectrum is about 2%, in opposite directions. No hysteresis effect was observed for pressures up to 8000 psi. The results are discussed briefly with reference to bond structure.

© 1958 Optical Society of America

Stress-Optical Study of Strontium Titanate*

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