Volume 1

A manual of chemistry / by William Thomas Brande.

  • William Thomas Brande
Date:
1848
Catalogue details

Licence: Public Domain Mark

Credit: A manual of chemistry / by William Thomas Brande. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

    1247/1276 (page 1117)
    SODA-ALUM. ]117 Soda 1 •••• 22 .... Alumina 1 •••• 52 .... Sulphuric acid 4 .... 1G0 .... Water 24 .... 21G .... Crystallized soda-alum 1 4 GO Zollnor. Urc. Graham. G-95 G-G7 . . 6-48 ] 11-31 . ... 11-00 . . 10-75 } .... 52-53 34-78 ... 34-32 . . 34-00 J 4G-9G ... 48-01 . . 49 00 .... 47-47 100-00 100-00 100-23 100 00 Sulphate op Alumina and Lithia. Lithia-Alum. L0,S03; Al2 03,3803; 24HO. When an aqueous solution of sulphate of lithia and tersulphate of alumina is subjected to spontaneous evaporation at a tem- perature not exceeding 52°, it yields octohedral and rhombic dodecahedral crystals soluble in 24 parts of cold, and 087 of boiling -water. (Kras- lovansky, Schtveigger’s Journ., Liv. 349): they consist of Lithia 1 .. 15 3-38 Alumina 1 .. 52 .... 11-7G Sulphuric acid 4 . .. ICO .... 3G-11 Water 24 . .. 21G .... 48-75 Crystallized lithia-alum 1 443 10000 Kraslovansky. Sulphate of lithia 1 .... 55 .... 1241 .... 13'56 Tersulphate of alumina .... 1 .... 172 .... 38‘fi2 .... 35-83 Water 24 .... 21G .... 4877 .... 50 61 1 443 100-00 100-00 Sulphate of Alumina and Magnesia. Magnesia-Alum. MuO, S03; Al2 03,3S03; 24HO. This salt (containing, according to Gmelin, 25HO) is found native, constituting a species of plumose alum: it con- tains 2-17 per cent, of oxide of manganese: it has been analysed by Stromeyer. When a mixed solution of sulphate of magnesia and tersul- phate of alumina with great excess of acid is subjected to spontaneous evaporation in a rough porcelain basin, it forms groups of acicular crystals = 3[Mg0,S03] + [Al2 03,3S03] + 36IIO. (Klauer, Ann. der Pharm., xiv. 264.) Sulphate op Alumina and Manganese. MnO,S03; Al2 0s,3S03; 24IIO (25HO?) This salt occurs native in transparent silky fibres, much resembling common alum in taste and solubility, but not crystallisable in octohedrons. In this salt MnO.IIO, .appears to be equivalent to KO, or to Xtl4 O, comparing it with potassa-alum, and ammonia-alum. (Kane. Apjohn, Poggend., xLiv. 471.) Sulphate of Alumina and Iron. The substance known under the name of plumose alum, which occasionally forms amianthine silky crystals or fibres upon decomposing pyritical clay-slate, is of variable composition, but appears essentially to consist of sulphate of alumina and sulphate of iron. A specimen analyzed by It. Phillips {Ann. Phil., xxi. 446) may be represented by the formula 6 [FeO,S03j + [Al2 0.1,2S03]+48IIO. Another specimen, analysed by Berthicr, and the so-called mountain butler (Bergbutter) described by Braudes (Sellmeiggers Journ., xxxix. 417) may be represented by 2[Fe0,S03] + [AI2 0.3,3S03] + 2/1IO.