At high pressure and temperature, water forms two crystalline phases, known as hot ‘black’ ices due to their partial opaqueness. A detailed characterization of these phases may explain magnetic field formation in giant icy planets like Neptune.

中文翻译：

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热黑冰

在高压和高温下，水会形成两个结晶相，因其部分不透明而被称为热“黑”冰。这些阶段的详细特征可以解释海王星等巨大冰行星中磁场的形成。