Christoph G. Salzmann, Ingrid Kohl, Thomas Loerting, Erwin Mayer and Andreas Hallbrucker

Phys. Chem. Chem. Phys., 2003, 5, 3507 (DOI: 10.1039/b305624d). Amendment published 24th July 2003.

Omit the passage from page 3514, column 1, lines 28 to 36:

We note that additional effects can occur when a sample is cooled under pressure and the DSC scan of the recovered sample recorded on subsequent heating at 1 bar which is the experimental setup used here. This is shown for polystyrene in Fig. 4.45 of ref. 37. Summarizing we cannot unambiguously decide whether the pronounced exotherm with T_min of 133 K shown in Fig. 6, curves (a) and (b), and the weak exothermic feature near T_onset in Fig. 2, curves (b) and (c), have the same origin.

Omit the passage from page 3514, column 2, line 61 to page 3515, column 1, line 7:

This shift of T_onset to lower temperature on second heating, or after annealing, could be caused by diffusion of impurities into the ice V lattice, thus acting as extrinsic Bjerrum defects and lowering the Arrhenius energy. The effect of dissolved impurities such as CO₂ or N₂ gas onto the dielectric relaxation time and Arrhenius energy had been ascertained for ice Ih, and similar conclusions have been drawn for interpreting the dielectric relaxation time of ice V.⁴² These extrinsic Bjerrum defects could be gaseous N₂ because, when the recovered ice V sample is filled under liquid N₂ into the DSC cell and the lid screwed on, considerable pressure buildup of gaseous N₂ could occur on heating and the N₂ penetrate the ice V lattice. Similar pressure buildup is unlikely in the high pressure vessel on cooling ice V to 77 K after its formation in the ice V domain.

Insert the following passage at page 3516, column 2, line 37, before "A further complication":

Further support for our reassignment of the endothermic step to ice XII instead of LDA comes from T_min of the intense exotherm caused by the phase transition to ice Ic: this was reported in our previous studies of pressure-amorphized ice Ih or ice Ic as 160 K for heating at a rate of 30 K min^-1 (cf. Table 1 in ref. 22). However, from this study it follows that this T_min is the value for the ice XII to ice Ic transition whereas T_min of the LDA to ice Ic transition is at 171 K.

To the acknowledgements should be added:

We are grateful to Prof. G. P. Johari for reading and commenting the manuscript.

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

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