Iron (III) Oxide, Fe 2 O 3 (Hematite)

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Iron (III) Oxide, Fe₂O₃ (Hematite)
Categories:	Ceramic; Oxide
Material Notes:	Red-brown hexagonal crystals. Weathering end product(s): Limonite, ochre. Occurrence: Pigment in sediments. Hydrates slowly to limonite, rust burst. Property values are typical of naturally occurring Hematite (Fe₂O₃). Actual property values will vary from sample to sample.
Key Words:	Fe2O3, Iron Oxide
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Physical Properties	Metric	English	Comments

Density	5.25 g/cc	0.190 lb/in³
a Lattice Constant	5.0329 Å	5.0329 Å
Beta Lattice Angle	13.749 °	13.749 °
Formula Units/Cell (Z)	6	6
Molecular Weight	159.688 g/mol	159.688 g/mol

Mechanical Properties	Metric	English	Comments
Hardness, Mohs	6.0	6.0
	5.5 - 6.5	5.5 - 6.5

Thermal Properties	Metric	English	Comments
CTE, linear	9.20 µm/m-°C @Temperature 20.0 - 200 °C	5.11 µin/in-°F @Temperature 68.0 - 392 °F	calculated from volumetric expansion
	10.4 µm/m-°C @Temperature 20.0 - 500 °C	5.78 µin/in-°F @Temperature 68.0 - 932 °F	calculated from volumetric expansion
Melting Point	1565 °C	2849 °F

Optical Properties	Metric	English	Comments
Refractive Index	2.91	2.91	ω, Na
	3.19 @Wavelength 589.3 nm	3.19 @Wavelength 589.3 nm	η, Na

Descriptive Properties
CAS Number	1309-37-1
Color	Red brown
Crystal Structure	Hexagonal -Rhombohedral		Corundum

References for this datasheet.

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EINOR0370 / 3499

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