The natural occurrence of ETA-alumina (η-Al2O3) in bauxite

Clays and Clay Minerals

Volumn 44, Issue 5, 1996, Pages 658-664

  Tilley, David B ^a   Eggleton, Richard A ^a  

^a AUSTRALIAN NATIONAL UNIVERSITY   (Australia)

Author keywords

Akdalaite; Bauxite; Chi alumina; Eta alumina; Gamma alumina; Pisoliths; Poorly diffracting material; Tohdite

Indexed keywords

BAUXITE; EPIGENETIC REPLACEMENT; ETA-ALUMINA; ETAALUMINA; KAOLINITE; PISOLITH; XRD;

AUSTRALIA, QUEENSLAND, ANDOOM;

EID: 0030438964     PISSN: 00098604     EISSN: None     Source Type: Journal    
DOI: 10.1346/CCMN.1996.0440508     Document Type: Article

References (14)

1. Brown JF, Clark D, Elliott WW. 1953. The thermal decomposition of the alumina trihydrate, gibbsite. J Chem Soc 13:84-88.
2. Lippens BC, de Boer JH. 1964. Study of phase transformations during calcination of aluminium hydroxides by selected-area electron diffraction. Acta Crystall 17:1312-1321.
3. Schwertmann U. 1988a. Some properties of soil and synthetic iron oxides. In: Stucki JW, Goodman BA, Schwertmann U, editors. Iron in soils and clay minerals. Dordrecht, Holland: D. Reidel Publishing Company, p 203-250.
4. Schwertmann U. 1988b. Occurrence and formation of iron oxides in various pedoenvironments. In: Stucki JW, Goodman BA, Schwertmann U, editors. Iron in soils and clay minerals. Dordrecht, Holland: D. Reidel Publishing Company, p 267-308.
5. Shirasuka K, Yanagida H, Yamaguchi G. 1976. The preparation of η-alumina and its structure. Yogyo Kyokai Shi 84:610-613.
6. Singh B, Gilkes RJ. 1995. The natural occurrence of Χ-alumina in lateritic pisolites. Clay Miner 30:39-44.
7. Spitler CA, Pollack SS. 1981. On the X-ray diffraction patterns of η- and γ-alumina. J Catal 69:241.
8. Stanjek H. 1991. Aluminium- und Hydroxylsubstitution in synthetischen und natürlichen Hämatiten. Buch am Erlbach, Germany: Verlag Marie L. Leidorf. 194 p.
9. Stumpf HC, Russell AS, Newsome JW, and Tucker CM 1950. Thermal transformations of aluminas and alumina hydrates. Ind Eng Chem 42:1398-1403.
10. 3+-kaolinite in bauxites and ferricretes: an approach to the mechanism of concretion formation. Am J Sci 285:865-903.
11. Taylor JC, Clapp RA. 1992. New features and advanced applications of SIROQUANT: A personal computer XRD full profile quantitative analysis software package Adv X-ray Anal 35:49-55.
12. 2O) in bauxites from northern Australia. Clays Clay Miner 42: 485-488.
13. Troland F, Tardy Y. 1987. The stabilities of gibbsite, boehmite, amorphous goethites and aluminous hematites in bauxites, ferricretes and laterites as a function of water activity, temperature and particle size. Geochim Cosmochim Acta 51:945-957.
14. Zhou R, Snyder RL. 1991. Structures and transformation mechanisms of the η, γ and 9 transition aluminas Acta Crystall B47:617-630.