Quantitative phase analysis of bidi-koum bauxites (Guinea)

Frank Feret, Montque Authier-Martin, I. Sajó

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Fifty-two Bidi-Koum bauxites from Guinea, Africa, of divesified chemical composition were characterized for their mineral composition. First, 14 element oxide concentration were determined by X-ray fluorescence (XRF) using a fusion sample preparation technique. Loss of Mass (LOM) and organic carbon (OC) concentrations were also determined. The intial X-ray diffraction (XRD) phase quantification was carried out employing XDB software. This software allows for full interpretation of a sample diffractogram and helps generate initial concentrations of identified minerals based on a standardless approach. In the stage that followed, the mass balance procedure on the XDB software helped refine the final phase composition. Then, gibbsite Al2O3 concentrations obtained by wet chemistry for all samples and kaolinitic SiO2 concentrations obtained for selected samples were compared with the concentrations obtained using the XDB software. Phases that were quantified are: gibbsite, boehmite, kaolinite, wavellite, goethite, hematite, quartz, anatase, rutile and illite. Phase concentrations were obtained for illite from K2O and for wavellite from P2O5 concentrations. The alumina substitution in the goethite lattice was also estimated.

Original languageEnglish
Pages (from-to)418-427
Number of pages10
JournalClays and Clay Minerals
Volume45
Issue number3
Publication statusPublished - 1997

Fingerprint

phosphorus pentoxide
Guinea
Minerals
Kaolin
software
gibbsite
Quartz
goethite
illite
Aluminum Oxide
Organic carbon
Chemical analysis
Phase composition
Oxides
mineral content
Substitution reactions
Fusion reactions
Fluorescence
boehmite
sampling

Keywords

  • Bauxite
  • Boehmite
  • Gibbsite
  • Goethite
  • Hematite
  • Quantitative Phase Analysis
  • Wet Chemistry
  • X-ray Diffraction
  • X-ray Fluorescence

ASJC Scopus subject areas

  • Soil Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology
  • Water Science and Technology

Cite this

Quantitative phase analysis of bidi-koum bauxites (Guinea). / Feret, Frank; Authier-Martin, Montque; Sajó, I.

In: Clays and Clay Minerals, Vol. 45, No. 3, 1997, p. 418-427.

Research output: Contribution to journalArticle

Feret, F, Authier-Martin, M & Sajó, I 1997, 'Quantitative phase analysis of bidi-koum bauxites (Guinea)', Clays and Clay Minerals, vol. 45, no. 3, pp. 418-427.
Feret, Frank ; Authier-Martin, Montque ; Sajó, I. / Quantitative phase analysis of bidi-koum bauxites (Guinea). In: Clays and Clay Minerals. 1997 ; Vol. 45, No. 3. pp. 418-427.
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