pangalan: iron(III) oxide; ferric oxide
* IUPAC
CAS Number: 1309-37-1
Chemical Formula: Fe₂O₃
Molar Mass: 159.6882 g
mass Percent: Fe 69.942 %; O 30.057 % 

• tulagay

• "The rich reddish color of the Needles in Canyonlands National Park in Utah is due to large amounts of iron(III) oxide, Fe₂O₃, in the rock." 1

• "...gives its rich rust-red color to iron ores and various clay minerals that contain Fe₂O₃." 2

• "Hematite (Fe₂O₃), the most important iron ore, contains about 70 per cent iron." 3

• "The most important ore of iron." 4

• "As pigment for rubber, paints, paper, linoleum, ceramics, glass; in paint for ironwork, ship hulls; as polishing agent for glass, precious metals, diamonds; in electrical resistors and semiconductors; in magnets, magnetic tapes; as catalyst; colloidal sol[utio]ns as stain for polysaccharides." 5

• "Ferric oxide is brittle and can be easily chipped off the surface, exposing fresh metal underneath to additional corrosion to the extent that holes (called pits) are formed." 6

2 Al (s) + 1 Fe2O3 (s hematite) → 2 Fe (s alpha) + Al2O3 (s alpha-corundum) 10
2 Al (s) + 1 Fe2O3 (s hematite) → 2 Fe (ℓ) + Al2O3 (s alpha-corundum) 11
2 Al (s) + 1 Fe2O3 (s hematite) → Al2O3 (s) + 2 Fe (s) 12
4 Fe (s alpha) + 3 O2 (g) → 2 Fe2O3 (s hematite) 13
2 Fe(OH)3 (s) → Fe2O3 (s) + 3 H2O (ℓ) 14
2 Fe2O3 (s hematite) + 3 C (s graphite) → 4 Fe (s alpha) + 3 CO2 (g) 15
4 FeO (s) + 1 O2 (g) → 2 Fe2O3 (s hematite) 16

Wikipedia
Journals:
Carrick M. Eggleston, Science 320, 184-185 (2008)
Jung Ho Ahn and Peter R. Buseck, Science 250, 111-113 (1990)
D. J. Dunlop, Science 169, 858-860 (1970)
Sid Perkins, Science News 175, 9 (2009)
Eric E. Roden and Robert G. Wetzel, Limnol. Oceanogr. 47, 198-211 (2002)

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(2) - Brady, James E. and Senese, Fred. Chemistry: Matter and Changes, 4th ed.; John Wiley and Sons: Hoboken, New Jersey, 2004; p 1007.
(3) - Zim, Herbert S. and Shaffer, Paul R. Rocks and Minerals; Golden Press: New York City, New York, 1957; p 40.
(4) - Pough, Frederick H. Rocks and Minerals, 4th ed,; Houghton Mifflin Company: Boston, MA, 1988; p 114.
(5) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 4058.
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(10) - Kotz, John C., Treichel, Paul, and Weaver, Gabriela. Chemistry & Chemical Reactivity 6th ed.; Thomson Brooks/Cole: Belmont, CA, 2006; p 157.
(11) - Zumdahl, Steven and Zumdahl, Susan A. Chemistry 9th ed.; Brooks/Cole: Belmont, CA, 2014; p 132.
(12) - Halka, Monica and Nordstrom, Brian. Metals & Metalloids; Infobase Publishing: New York, NY, 2011; p 15.
(13) - Ebbing, Darrell D. General Chemistry 3rd ed.; Houghton Mifflin Company: Boston, MA, 1990; p 77.
(14) - Halka, Monica and Nordstrom, Brian. Metals & Metalloids; Infobase Publishing: New York, NY, 2011; p 7.
(15) - Kotz, John C., Treichel, Paul, and Weaver, Gabriela. Chemistry & Chemical Reactivity 6th ed.; Thomson Brooks/Cole: Belmont, CA, 2006; p 167.
(16) - Zumdahl, Steven and Zumdahl, Susan A. Chemistry 9th ed.; Brooks/Cole: Belmont, CA, 2014; p 131.