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An iron hydride is a chemical system which contains iron and hydrogen in some associated form, either as compounds or mixtures, as in the case of alloys. Because of the common occurrence of those two elements in the universe, possible compounds of hydrogen and iron have attracted the attention of many chemists and physicists. However, the two elements do not combine in ordinary conditions.〔〔 A few molecular compounds have been detected in extreme environments (such as stellar atmospheres) or isolated in small amounts at very low temperatures. The two elements form a metallic alloy above 35000 atmospheres of pressure, that has been advanced as a possible explanation for the low density of Earth's "iron" core.〔〔 However those compounds are unstable when brought to ambient conditions, and eventually decompose into the separate elements. On the other hand, there are many fairly stable hydride complexes where iron is bound to hydrogen (among other elements).〔〔 Small amounts of hydrogen (up to about 0.08% by weight) may be absorbed into iron as it solidifies from molten state.〔 This impurity does not change iron's crytalline structure, but can affect its mechanical properties. == Overview == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Iron hydride」の詳細全文を読む スポンサード リンク
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