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In this work we synthesized BaTaO2N and SrTaO2N using a two‐step high‐temperature solid‐state reaction method and analysed the structural distortions, relative to the ideal cubic perovskite structure, according to group theory. From a complete distortion analysis/refinement using high‐resolution neutron diffraction data in the temperature range 8 to 613 K, we identified tetragonal structures for BaTaO...