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Ferric-oxide definition

A dark red compound, Fe2 O3 , occurring naturally as hematite ore and rust and used in pigments and metal polishes and on magnetic tapes.
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A brown or reddish oxide of iron, Fe2O3, occurring naturally as hematite or prepared by the oxidation of iron: used as a pigment, in polishing compounds, in magnetic tapes, etc.
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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: Fe2O3.
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(Fe2O3) An oxidation of iron used in the coating of magnetic disks and tapes. See ferrous.
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(chemistry) The chemical compound Fe2O3, iron oxide where iron has a valence of +3. IUPAC has deprecated this term in favor of iron(III) oxide.
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Ferric-oxide Sentence Examples

  • He points out that the available oxygen in the oxides may react either as SO 2 + H 2 O ?-- O = H 2 SO 4 or as 2S0 2 -IH20 + 0 = H 2 S 2 0 6; and that in the case of ferric oxide 96% of the theoretical yield of dithionate is obtained, whilst manganese oxide only gives about 75%.

  • To tin cast-iron articles they must be decarburetted superficially by ignition within a bath of ferric oxide (powdered haematite or similar material), then cleaned with acid, and tinned by immersion, as explained above.

  • By converting ferrous into ferric oxide the green tint is changed to yellow, which is less noticeable.

  • Red mud may be classed as a variety of blue mud, from which it differs on account of the larger proportion of ochreous substance and the absence of sufficient organic matter to reduce the whole of the ferric oxide.

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