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

Thus the silica may range from 19 to 27%, the alumina and ferric oxide jointly from 7 to 14%, the lime from 60 to 67%.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

The ferric hydroxide accumulates in the sheath, and gradually passes into the more insoluble ferric oxide.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" by Various

It consists of clear crystalline sapphire coloured with a small quantity of ferric oxide.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various

When we say that oxygen and iron unite and form ferric oxide, we express a law of matter: that is, that these elements have an affinity for each other.

From Report on Surgery to the Santa Clara County Medical Society by Cox, Joseph Bradford