Значения термина ferric oxide на английском

The ferric oxide of the cement is unaffected by sea- water.

The precipitate may then be ignited and weighed as ferric oxide, as described on page 110.

These generally consist of ferric oxide and alumina.

Agate is stained red, so as to form carnelian and sardonyx, by means of ferric oxide.

The iron is oxidized to ferric oxide.]

The aluminium is then determined by difference, after subtracting the weight of ferric oxide corresponding to the amount of iron found.

It is a common practice to determine the iron, calculate it to ferric oxide, and so to estimate the alumina indirectly.

Since a high temperature tends to lessen the solubility of ferric oxide, the heat should not be raised above low redness.]

The residue after ignition consists of ferric oxide, alumina, and mangano-manganic oxide (Mn_{3}O_{4}), if manganese is present.

From the weight of ferric oxide (Fe_{2}O_{3}) calculate the percentage of iron (Fe) in the sample (Note 3).

The ash is made up of silica, 55.6; ferric oxide, 12.2; alumina, 22.14; lime, 1.5; sulphur, 0.9; soluble salts (containing 0.92 per cent.

The American bauxites contain from 38 to 67% of alumina, from 1 to 23% of ferric oxide, and from 1 to 32% of silica.

A sample of magnesia limestone has the following composition: Silica, 3.00%; ferric oxide and alumina, 0.20%; calcium oxide, 33.10%; magnesium oxide, 20.70%; carbon dioxide, 43.00%.

Ferric oxide is the most abundant ore of iron and occurs in great deposits, especially in the Lake Superior region.

[Note 2: Ignited ferric oxide is somewhat hygroscopic.