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Research Elements

Hematite

Compound · Fe2O3

Elements

Iron, Oxygen

Crystal structure

One unit cell, the smallest block that repeats in every direction to build the whole crystal. Atoms on its faces, edges and corners are shared with the neighboring cells. Farther atoms are drawn fainter.
Cell: a = b = 5.0355 Å, c = 13.7471 Å, angles 90°, 90° and 120°
Space group: R -3 c :H

Atom positions from the Crystallography Open Database entry 2101167 (Maslen, E. N.; Streltsov, V. A.; Streltsova, N. R.; Ishizawa, N., 1994).

Where it's found

The most important iron ore. The largest deposits are banded iron formations, such as the Pilbara in Western Australia, Carajás in Brazil and Kryvyi Rih in Ukraine. It also colors many soils and sedimentary rocks red.

How it's mined

Mostly open pit: the ore is drilled, blasted and loaded into haul trucks. High-grade ore is crushed, screened and shipped as lump and fines. Lower-grade ore is concentrated by gravity or magnetic separation and flotation, then rolled into pellets for blast furnaces.