Combined thermal and structural study of some Egyptian bentonitic clays

被引：8

作者：

ElShabiny, AM ^{[1
]}

Hammad, SM ^{[1
]}

Ibrahim, IA ^{[1
]}

Ismail, AK ^{[1
]}

机构：

[1] CMRDI, CAIRO, EGYPT

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1996年 / 46卷 / 05期

关键词：

bentonitic clay; IR spectroscopy; thermal analyses; X-ray diffraction;

D O I：

10.1007/BF01979255

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Egyptian bentonitic clays from Qasr El-Sagha, Wadi El-Rayan, Kom Oshim and the Cairo - Alexandria desert road were studied thermally (TG, DTG and DTA) and structurally (XRD and IR). The clay fraction consisted mainly of montmorillonite, kaolinite and some illite. Gypsum, quartz and calcite were also identified. It was found that the Na- to Ca-montmorillonite ratio increases in the following sequence: Qasr El-Sagha<Wadi El-Rayan<Kom Oshim<Cairo - Alexandria desert road. There is a marked concentration of gypsum, the highest amount occurring in the bentonite from Qasr El-Sagha, and the least in that from the Cairo - Alexandria desert road. Calcite was mainly found in Kom Oshim, with a very small amount from the Cairo - Alexandria desert road. Magnesium is more abundant than iron in the octahedral layer and increases in the following sequence: Cain, - Alexandria desert road<Kom Oshim<Wadi El-Rayan<Qasr El-Sagha.

引用

页码：1421 / 1435

页数：15

共 11 条

[1]

BETHKE CM, 1989, CLAYS CLAY MINERALS, V34, P224

[2]

Brindley G. W., 1980, CRYSTAL STRUCTURES C, P170

[3]

FIELDS M, 1956, J SCI TECH, P38

[4]

GRIMSHOW RW, 1945, BRIT CERAM T, V44, P69

[5]

HAYASHI H, 1965, AM MINERAL, V50, P476

[6]

KOEBLE EF, 1967, HDB XRAYS

[7]

MACKENZIE RC, 1967, ADV TOPICS CLAY MINE

[8]

MACKENZIE RC, 1949, MINERAL MAG, V28, P704

[9]

Moore D, 1989, XRAY DIFFRACTION IDE

[10] PILLARING PROCESSES OF SMECTITES WITH AND WITHOUT TETRAHEDRAL SUBSTITUTION [J].

PLEE, D ;

GATINEAU, L ;

FRIPIAT, JJ .

CLAYS AND CLAY MINERALS, 1987, 35 (02) :81-88

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