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Ferrite - also known as alpha iron - comes from the Latin word for iron, ferrum.
Pretty sure it is ferrite
hematite, taconite, and ferrite
In general only the ferrite group :
iron, nickel, cobalt.
Other material may be alloyed with these, but the ferrite group is essential.
It is one form of Iron Ferrite where the lattice structure is body-centered and more stable than other allotropes (forms).