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.

---

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

---

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 .

---

Etymology

Origin of ferric oxide

First recorded in 1880–85

Example Sentences

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

Chalybeate waters, pools in marshes near ironstone, &c, Iron bacteria. abound in bacteria, some of which belong to the remarkable genera Crenothrix, Cladothrix and Leptothrix, and contain ferric oxide, i.e. rust, in their cell-walls.

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

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

Filter, wash with hot water, dry, ignite, and weigh as mixed alumina and ferric oxide.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius