Correction: High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag₂S and argentite β-Ag₂S

Abstract

Correction for ‘High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag₂S and argentite β-Ag₂S’ by S. I. Sadovnikov et al., Phys. Chem. Chem. Phys., 2016, 18, 4617–4626.

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The authors wish to draw the readers' attention to their previous related study, published in Physics of the Solid State,¹ which should have been cited in this Physical Chemistry Chemical Physics paper.

The study published in this Physical Chemistry Chemical Physics paper contains new experimental X-ray diffraction data, differential thermal and thermogravimetric analysis (DTA-DTG) results and data on the acanthite–argentite phase transformation enthalpy. This Physical Chemistry Chemical Physics paper was accepted before the publication of ref. 1 but published after ref. 1. Therefore ref. 1 should have been cited in this Physical Chemistry Chemical Physics paper.

The authors regret not giving the correct attribution for Fig. 4, 6, 7, 8 and 9 in the paper, which were reproduced for the readers' information. The figures are reproduced below with the correct copyright permission text.

Fig. 4 The effect of temperature T on the unit cell parameters a, b, c, β, and volume V, and on the volumetric thermal expansion coefficient β_V of coarse- and nanocrystalline acanthite. The approximation of the experimental data by the solid line and the closed symbols (●), (▲), (▼), (×), (■), and (♦) corresponds to coarse-crystalline acanthite and the approximation by the dotted line and the open symbols (), (), (), (), (), and () corresponds to nanocrystalline acanthite. Reproduced from ref. 1 with permission from Springer.

Fig. 6 Evolution of XRD patterns of coarse-crystalline argentite β-Ag₂S in the temperature range of 446–623 K. The inset shows a systematic displacement of the (200) diffraction reflection of bcc argentite with increase of measuring temperature. Reproduced from ref. 1 with permission from Springer.

Fig. 7 Dependence of the lattice constant a_arg of argentite β-Ag₂S on the temperature T: (1) data of present work; (2), (3), and (4) data,^22,24,27 respectively. The approximations of measured lattice constant a_arg by the function (10) in the temperature range of 440–660 K is shown by solid lines. Reproduced with some changes from ref. 1 with permission from Springer.

Fig. 8 Temperature dependence of linear thermal expansion coefficient α_arg of argentite β-Ag₂S and its approximation by the function (12). Reproduced from ref. 1 with permission from Springer.

Fig. 9 The temperature dependencies of reduced volume V_un.cell/z (a) and isotropic linear thermal expansion coefficient α (b) of silver sulfide in the of range 300–623 K. At ∼440 K, there take place jumps of the reduced volume and the thermal expansion coefficient α attributed to the first-order acanthite–argentite phase transformation. Isotropic linear thermal expansion coefficient α_{ac-nano isotr} of nanocrystalline acanthite α-Ag₂S is larger than α_ac isotr of coarse-crystalline acanthite. Reproduced with changes from ref. 1 with permission from Springer.

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

References

1. A. I. Gusev, S. I. Sadovnikov, A. V. Chukin and A. A. Rempel, Phys. Solid State, 2016, 58, 251–257.

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