Abstract
The number, size and shape of volume defects in pure and amino-acid doped triglycine sulfate were qualitatively evaluated by Tyndall scattering of laser light. The light scattering results correlate with measurements of dielectric loss in the paraelectric region. The size and concentration of volume defects are highly variable between different crystals grown in the same batch and between different volume regions of the same crystals. The more perfect and less lossy crystals appear to contain voids of smaller size rather than voids in smaller number.
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