Piezoelectric coefficients d₁₄, d₁₆, d₃₄ and d₃₆ of an L-arginine hydrochloride monohydrate crystal by X-ray three-beam diffraction

Previous work employed X-ray three-beam diffraction techniques to obtain part of the L-arginine hydrochloride monohydrate (L-AHCL.H₂O) piezoelectric coefficients, namely d₂₁, d₂₂, d₂₃ and d₂₅. Those coefficients were obtained by measuring the shift in the angular position of a number of secondary reflections as a function of the electric field applied in the [010] piezoelectric direction. In this paper a similar procedure has been used to measure the remaining four piezoelectric coefficients in L-AHCL.H₂O: with the electric field applied in the [100] direction, d₁₄ and d₁₆ were measured; with the electric field applied in the [001] direction, d₃₄ and d₃₆ were obtained. Therefore the entire piezoelectric matrix of the L-AHCL.H₂O crystal has been successfully measured.