The space group of γ-In₂Se₃ and γ₁-(Ga_xIn_1−x)₂Se₃: erratum

In the paper Revised and new crystal data for indium selenides by Popović, Tonejc, Gržeta-Plenković, Čelustka & Trojko [J. Appl. Cryst. (1979), 12, 416–420] it was concluded that P6₁22 or P6₅22 was the probable space group of the second high-temperature, γ, phase of In₂Se₃. Also, in the paper Phases, lattice parameters and thermal expansion of (Ga_xIn_1−x)₂Se₃, 1 ≥ x ≥ 0, between room temperature and melting point by Tonejc, Popović & Gržeta-Plenković [J. Appl. Cryst. (1980), 13, 24– 30] the same space groups were suggested for the phase γ₁, existing in the In-rich region. However, the space group in both cases should be P6₁ or P6₅. This is in agreement with the work of Likforman, Carré & Hillel [Acta Cryst. (1978), B34, 1 5] who solved the crystal structure of one of the forms of In₂Se₃, and with the work of Schulte-Kellinghaus & Krämer [Acta Cryst. (1979), B35, 3016 3017] who solved the crystal structure of AlInS₃. Likforman, Carré & Hillel [Acta Cryst. (1978), B34, 1 5] call their phase the low-temperature form of In₂Se₃.