Abstract Iron is a ubiquitous element in terrestrial and extra-terrestrial settings and can provide clues as to the conditions during which planetary scale processes occurred. One example of this is determining the conditions accompanying metal core formation in rocky planets and planetesimals. For at least two decades there has been a growing database of experimental and natural data aimed at understanding whether iron isotopes fractionate during the separation of silicate and metal. While it has been argued that the data are not in agreement with one another, it is apparent that once criteria are established that prove equilibrated samples, there is good agreement amongst the different studies when looked at as a function of the metallic composition. Proving equilibrium is critical in these types of experiments. The three-isotope experimental technique for establishing equilibrium is found to be both mathematically and fundamentally sound. Further it is clear that the question of whether there is an equilibrium iron isotope fractionation between metal and silicate is not straightforward and that it can vary significantly as a function of temperature, pressure, metallic composition, oxygen fugacity, and silicate composition.

中文翻译：

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岩心形成过程中铁同位素分馏的评估

摘要 铁是地球和外星环境中无处不在的元素，可以提供有关行星尺度过程发生条件的线索。这方面的一个例子是确定岩石行星和微行星中金属核形成的条件。至少二十年来，越来越多的实验和自然数据数据库旨在了解铁同位素在硅酸盐和金属分离过程中是否会分馏。虽然有人认为这些数据彼此不一致，但很明显，一旦建立了证明平衡样品的标准，当将其视为金属成分的函数时，不同研究之间就会有很好的一致性。在这些类型的实验中，证明平衡是至关重要的。发现用于建立平衡的三同位素实验技术在数学上和从根本上都是合理的。此外，很明显，金属和硅酸盐之间是否存在平衡铁同位素分馏的问题并不简单，它可以作为温度、压力、金属成分、氧逸度和硅酸盐成分的函数而显着变化。