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Enthalpy Change from Pure Cubic Ice Ic to Hexagonal Ice Ih
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2023-05-25 , DOI: 10.1021/acs.jpclett.3c00408 Christina M Tonauer 1 , Keishiro Yamashita 1 , Leonardo Del Rosso 2 , Milva Celli 2 , Thomas Loerting 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2023-05-25 , DOI: 10.1021/acs.jpclett.3c00408 Christina M Tonauer 1 , Keishiro Yamashita 1 , Leonardo Del Rosso 2 , Milva Celli 2 , Thomas Loerting 1
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The preparation of pure cubic ice without hexagonal stacking faults has been realized only recently by del Rosso et al. ( Nat. Mater. 2020, 19, 663−668) and Komatsu et al. ( Nat. Commun. 2020, 11, 464). With our present calorimetric study on the transition from pure cubic ice to hexagonal ice we are able to clarify the value of the enthalpy change ΔHc→h to be −37.7 ± 2.3 J mol–1. The transition temperature is identified as 226 K, much higher than in previous work on ice Isd. This is due to a catalytic effect of hexagonal faults on the transition, but even more importantly due to a relaxation exotherm that was not properly identified in the past.
中文翻译：
从纯立方冰 Ic 到六方冰 Ih 的焓变
del Rosso 等人最近才实现了无六角堆垛层错的纯立方冰的制备。( Nat. Mater. 2020 , 19 , 663−668) 和 Komatsu 等人。( Nat. Commun. 2020 , 11 , 464)。通过我们目前对从纯立方冰到六角冰转变的量热研究，我们能够阐明焓变 Δ H c→h的值为−37.7 ± 2.3 J mol –1。转变温度确定为 226 K，远高于之前在冰上的工作 I sd. 这是由于六方断层对转变的催化作用，但更重要的是由于过去未正确识别的弛豫放热。
更新日期：2023-05-25
中文翻译：
从纯立方冰 Ic 到六方冰 Ih 的焓变
del Rosso 等人最近才实现了无六角堆垛层错的纯立方冰的制备。( Nat. Mater. 2020 , 19 , 663−668) 和 Komatsu 等人。( Nat. Commun. 2020 , 11 , 464)。通过我们目前对从纯立方冰到六角冰转变的量热研究，我们能够阐明焓变 Δ H c→h的值为−37.7 ± 2.3 J mol –1。转变温度确定为 226 K，远高于之前在冰上的工作 I sd. 这是由于六方断层对转变的催化作用，但更重要的是由于过去未正确识别的弛豫放热。
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