Table 1 Possible transitions to the ferroelastoelectric phase within the tetragonal system.

From: Spontaneous piezoeletric effect as evidence of ferroelastoelectricity in guanidine zinc sulfate crystal

Point group above TC

Point group below TC

4/mmm (non piezo)

\(\overline{4}\)2 m; 422; \(\overline{4}\)

4/m (non piezo)

\(\overline{4}\)

\(\overline{4}\)2 m (piezo)

\(\overline{4}\)

Back to article page