MOSSBAUER, XRD AND POSITRON-ANNIHILATION STUDIES ON NATURAL MAGNETITE AND HEMATITE ORE FROM ARI-DONGRI, CENTRAL INDIA

被引：8

作者：

DAS, D

CHAKRABORTI, MB

CHOUDHURY, K

NAMBISSAN, PMG

BABU, BRS

SEN, P

SANGEETA

MAJUMDAR, CK

机构：

[1] PRESIDENCY COLL,DEPT GEOL,CALCUTTA 700073,W BENGAL,INDIA

[2] BHABHA ATOM RES CTR,DIV TECH PHYS & PROTOTYPE ENGN,BOMBAY 400085,INDIA

[3] SN BOSE NATL CTR BASIC SCI,CALCUTTA 700064,INDIA

[4] SAHA INST NUCL PHYS,DIV CYCL ACCELERATOR,CALCUTTA 700009,W BENGAL,INDIA

来源：

BULLETIN OF MATERIALS SCIENCE | 1992年 / 15卷 / 02期

关键词：

MOSSBAUER; X-RAY DIFFRACTION; POSITRON; MAGNETITE; HEMATITE ORE;

D O I：

10.1007/BF02927442

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Natural magnetite and hematite samples taken from iron ore deposits associated with Precambrian banded iron-formation (BIF) at Ari Dongri (20-degrees-23'N:81-degrees-3'E), Bastar district in Central India have been studied by Mossbauer, XRD and positron annihilation techniques. Three magnetic samples show a genetic association with alpha-Fe2O3 with a wide range of variations in Fe3O4:alpha-Fe2O3 ratio. The fourth sample, a typical specular hematite, shows alpha-Fe2O3 content of the order of 90%, the rest being magnetite. The magnetite present in the samples was found to be stoichiometric. None of the samples contains maghemite (gamma-Fe2O3). Some geological implications of the observed variation in the oxidation states of the samples are considered.

引用

页码：161 / 170

页数：10

共 15 条

[1]

Bancroft G. M., 1973, MOSSBAUER SPECTROSCO

[2]

BERRY LG, 1974, POWDER DIFFRACTION F

[3] POSITRON-ANNIHILATION STUDIES ON AL2O3 POWDERS [J].

BRAUER, G ;

KERBE, F ;

KAJCSOS, Z ;

ASHRY, A .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1984, 84 (02) :451-455

[4]

COEY JMD, 1971, J PHYS PARIS C, V1, P271

[5]

DANNIELS JM, 1969, PHYS CHEM SOLIDS, V30, P1561

[6] MOSSBAUER-SPECTROSCOPY OF GREEN SHALE FROM BANDED IRON FORMATION [J].

DAS, D ;

CHAKRABARTI, MB ;

MAJUMDAR, CK ;

BOSE, MK .

PRAMANA, 1986, 27 (1-2) :331-336

[7]

Kalliokoski J, 1965, ECON GEOL, V60, P100, DOI 10.2113/gsecongeo.60.1.100

[8] POSITRONFIT EXTENDED - NEW VERSION OF A PROGRAM FOR ANALYZING POSITRON LIFETIME SPECTRA [J].

KIRKEGAARD, P ;

ELDRUP, M .

COMPUTER PHYSICS COMMUNICATIONS, 1974, 7 (07) :401-409

[9]

Melnik Y.P., 1982, PRECAMBRIAN BANDED I, V5

[10] LIFETIME SPECTRA OF POSITRONS IN ZRO2 [J].

MITSUHASHI, T ;

TSUDA, N ;

CHIBA, T ;

NOGUCHI, M ;

ONO, A ;

ICHIHARA, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1972, 32 (05) :1281-+

← 1 2 →