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Figure 3
SPEM data (Burgener, 2014BB13) for an NaClO3 crystal. Electrodes (green) measure the pyroelectric current in the [001] and [010] directions. The crystal was obtained by isothermal evaporation (25°C) of water. Alternating polarity appears in opposite sectors. Due to structural features, here the polarity is detected at 90° to the electrodes (normally at 0°).

IUCrJ
Volume 4| Part 4| July 2017| Pages 360-368
ISSN: 2052-2525
https://doi.org/10.1107/S205225251700700X