ferric oxide

American  

noun

Chemistry.

1. a dark-red, crystalline, water-insoluble solid, Fe 2 O 3 , occurring naturally, as hematite and rust, or synthesized: used chiefly as a pigment, as a mordant, as a coating for magnetic recording tape, and in the manufacture of polishing compounds.

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ferric oxide British  

noun

1. Systematic name: iron (III) oxide. a red crystalline insoluble oxide of iron that occurs as haematite and rust and is made by heating ferrous sulphate: used as a pigment and metal polish ( jeweller's rouge ), and as a sensitive coating on magnetic tape. Formula: Fe 2 O 3

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ferric oxide Scientific  

1. A reddish-brown to silver or black compound which occurs naturally as the mineral hematite and as rust. It is often used as a pigment and a metal polish. Chemical formula: Fe ₂ O ₃ .

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Etymology

Origin of ferric oxide

First recorded in 1880–85

Example Sentences

See Examples For:

ferric oxide

His first major product was the development of a tape recorder: he heated ground iron in a frying pan to collect the ferric oxide he needed to make magnetic tape.

From New York Times ● Feb. 28, 2011

The resulting dark-brown pigment may remain at the seat of the hemorrhage indefinitely, and may be accompanied with reddish-brown flakes, which, as shown by Kunkel,43 are composed of hydrated ferric oxide.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various

If silica be present, it gives the iron bead when heated with a little ferric oxide; if tin is present there is no change.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

The most important substances present in soils are as follows: silica, alumina, lime, magnesia, potash, soda, ferric oxide, manganese oxide, sulphuric acid, phosphoric acid, and chlorine.

From Manures and the principles of manuring by Charles Morton Aikman

The red colour of typical carnelian is due to the presence of ferric oxide.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" by Various