sid·er·o·phile 
(sĭdər-ə-fīl′)
(sĭdər-ə-fīl′)adj.
Relating to or being an element, such as gold, platinum, or iridium, that exhibits metallic bonding and has an affinity for iron. On earth, the siderophile elements are found in greatest abundance in the iron core.
n.
A siderophile element.