Skip to main content Accessibility help

Conditions for the formation of bayerite and gibbsite

  • W. J. Mchardy (a1) and A. P. Thomson (a1)


Aluminium hydroxide gels have been prepared by the hydrolysis of amalgamated aluminium in water and by precipitation from aluminium salt solutions with an anion exchange resin in the hydroxyl form. The products crystallizing from such gels have been examined by electron microscopy and by X-ray and electron diffraction. Bayerite crystallizes as cone or pyramid-shaped particles and gibbsite as hexagonal plates or prisms. Two types of gel are postulated. The first type, pseudoboehmite, predominates in the absence of acids, is uncharged and rapidly crystallizes to bayerite; the second type, pregibbsite gel, occurs in carboxylic acid solutions, is positively charged and, in the absence of inorganic anions, crystallizes slowly to gibbsite.



Hide All
Aldcroft, (D.) and Bye, (E.C.), 1967. Sci. Ceram. 3, 75.
Bentor, (Y.K.), Gross, (S.), and Heeler, (L.), 1963. Amer. Min. 48, 924.
Brunauer, (S.), Emmett, (P.H.), and Teller, (E.), 1938. Journ. Amer. Chem. Soe. 60, 309.
Fricke, (R.) and Jockers, (K.), 1947. Zeits. Naturforsch. 2, 244.
Gastuche, (M.C.) and Herbillon, (A.), 1962. Bull. Soc. Chim. France, 1404.
Hathaway, (J.C.) and Schlanger, (S.O.), 1965. Amer. Min. 50, 1029.
Hirsch, (P.B.), Howie, (A.), Nicholson, (R.B.), Pashley, (D.W.), and Whelan, (M.J.), 1965. Electron Microscopy of Thin Crystals'. Butterworths, London, p. 117.
Kay, (D.), 1961. Techniques for Eleetron Miscroscopy. Blackwell Scientific Publications, Oxford, P. 93.
Lippens, (B.C.), 1961. Structure and texture of aluminas. Proefschr.-Tech. Hogesch., Delft.
Mackenzie, (R.C.), Meldau, (R.), and Gard, (J.A.), 1962. Min. Mag. 33, 145.
Marboe, (E.C.) and Bentur, (S.), 1961. Silic. ind. 26, 389.
Megaw, (H.D.), 1934. Zeits. Krist. 87, 185.
Montoro, (V.), 1942. Rieerea seient. 13, 565.
Papeé, (D.), Tertian, (R.), and Biais, (R.), 1958. Bull. Soc. Chim. France, 1301.
Saalfeld, (H.), 1960. Neues Jahrb. Min. Abh. 95, 1.
VAN NORDSTRAND, (R.A.), Hettinger, (W.P.), and Keith, (C.D.), 1956. Nature, 177, 713.
Watson, (J. H. L.), Parsons, (J.), VALLEGO-Freire, (A.), and SOUZA-Santos, (P.), 1955. Kolloidzeits. 140, 102.
Yamaguchi, (G.) and Sakamoto, (K.), 1960. Canad. Journ. Chem. 38, 1395.

Conditions for the formation of bayerite and gibbsite

  • W. J. Mchardy (a1) and A. P. Thomson (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed