Titre :

Deep Characterizations and Rietveld Refinement of Natural Phosphate Mining from Kef Esnoun, Algeria

Auteur(s) :

Benmerabet, I. [Auteur]
Faculté de Technologie [Skikda]
Benrabaa, R. [Auteur]
University Chadli Bendjedid El Tarf
Fares, A. [Auteur]
Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques [CRAPC]
Cherif, N. F. [Auteur]
Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques [CRAPC]
Rubbens, Annick [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Roussel, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Titre de la revue :

ChemistrySelect

Numéro :

7

Date de publication :

2023-01-08

ISSN :

2365-6549

Mot(s)-clé(s) :

Algerian natural phosphate
HT-XRD
Raman scattering
Rietveld refinement
Structural change

Discipline(s) HAL :

Chimie/Chimie inorganique

Résumé en anglais : [en]

The main physico-chemical properties and the underlying influence of thermal treatment on the phase composition and structural characteristics of the natural phosphate Kef Esnoun region in Djebel Onk, Algeria, are discussed ...
Lire la suite >The main physico-chemical properties and the underlying influence of thermal treatment on the phase composition and structural characteristics of the natural phosphate Kef Esnoun region in Djebel Onk, Algeria, are discussed in this work. The primary goal is to increase the natural phosphate value as an alternative material in heterogeneous catalysis. The phase evolution during the heat treatment of the natural phosphate was carried out at different temperatures ranging from 600 to 1000 °C. Several complementary analytical methods were used for their characterization before and after thermal treatments. The obtained results by X-Ray Diffraction supplemented by the Rietveld method and confirmed by molecular spectroscopy have shown that the raw natural phosphate consists primarily of a fluorapatite-type structure (Ca5(PO4)3F). Furthermore, high-temperature X-ray diffraction and thermal analyses have shown that dolomite which is one of the natural phosphate constituents is fully decomposed into CaO and MgO phases after heating at 700 °C. At 900 °C, the phase composition is (Ca5 (PO4)3F; 98.23 %), (MgO; 1.1 %) and (CaO; 0.67 %) with a crystallite size value of approximately 300 nm. Cell parameters increase with calcination temperatures due to the substitution of carbonate with PO4−3 groups.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Date de dépôt :

2023-03-09T01:28:19Z
2023-03-23T12:08:51Z