Allotropes
At least four allotropes of iron (differing atom arrangements in the solid) are known, conventionally … 展开

Iron shows the characteristic chemical properties of the transition metals, namely the ability to form variable oxidation states differing by steps of one and a very large coordination and organometallic chemistry: indeed, it was the discovery of an iron compound, 展开

Development of iron metallurgy
Iron is one of the elements undoubtedly known to the ancient world. It has been worked, or wrought, for millennia. However, iron artefacts of … 展开

Laboratory routes
For a few limited purposes when it is needed, pure iron is produced in the laboratory in small … 展开

Cosmogenesis
Iron's abundance in rocky planets like Earth is due to its abundant production during the runaway fusion and explosion of type Ia … 展开

Iron plays a certain role in mythology and has found various usage as a metaphor and in folklore. The Greek poet Hesiod's Works and Days (lines 109–201) lists different 展开

As structural material
Iron is the most widely used of all the metals, accounting for over 90% of worldwide metal … 展开