CRYSTAL FORM OF PHOSPHORIC-ACID-DOPED TRIGLYCINE SULFATE

Single crystals of phosphoric-acid-doped triglycine sulfate (TGSP) wer e grown from aqueous solutions with various concentrations of H3PO4 in the ferroelectric phase. The development of crystal faces is graduall y modified as the concentration of H3PO4 in the solution becomes highe r. In particular, the {010} faces become more conspicuous with greater doping. A high number of H3PO4 molecules are incorporated into the {0 10} growth sectors. The general crystal form shows the nonpolar 2/m sy mmetry similar to that of pure TGS, due to its multidomain structure.