Magnetite in soils: I. The synthesis of single-domain and superparamagnetic magnetite

Clay Minerals - Tập 22 Số 4 - Trang 411-422 - 1986
R. M. Taylor1, Barbara A. Maher2, Peter Self1
1CSIRO Division of Soils, Adelaide, South Australia
2Department of Geophysics, University of Edinburgh, Scotland

Tóm tắt

AbstractA series of experiments has been carried out to investigate the possible formation of magnetite, Fe3O4, under ambient soil-forming conditions. Rapid and easy synthesis of magnetite was achieved through controlled oxidation of Fe2+solutions at room temperatures and near neutral pH values. The synthetic products were found to range in size between 0·01–0·07µm (mean diameter) and hence span the theoretical superparamagnetic-single-domain grain-size boundary.

Từ khóa


Tài liệu tham khảo

10.1126/science.472725

10.1029/JB078i011p01780

10.1016/0048-9697(84)90387-5

Lins de Baros D.N.S. , Esquival J. , Danon J. & de Oliviera L.P.H. (1981) Magnetotactic algae. Acad. Bras. Notas. Fis. CBPF-NF-48.

10.1180/claymin.1980.015.4.04

10.5636/jgg.25.213

10.1130/0091-7613(1983)11<221:DMCAYS>2.0.CO;2

10.1038/320611a0

10.1016/0012-821X(81)90156-4

Sanmagudas K. (1971) A study of the trace elements associated with the iron oxide fraction of soils. Ph.D. Thesis, Univ. Coll. N. Wales, Bangor U.K.

Schwertmann, 1988, Minerals in Soil Environments

10.1111/j.1365-246X.1986.tb04522.x

10.1016/S0031-9201(86)80010-3

10.1146/annurev.mi.36.100182.001245

Le Borgne, 1955, Susceptibilite magnetique anomale du sol superficial, Ann. Geophys., 16, 159

10.2113/gsecongeo.49.1.101

10.1126/science.201.4360.1026

Farrell, 1972, Mines Branch Invest. Report lR,72-11

Kirschvink, 1981, Ferromagnetic crystals (magnetite?) in human tissues, J. Exp. Biol., 92, 333, 10.1242/jeb.92.1.333

10.1130/0091-7613(1984)12<559:UMIDSP>2.0.CO;2

10.1111/j.1365-2389.1979.tb00968.x

10.1126/science.7008198

10.1126/science.7256282

10.1111/j.1365-2389.1977.tb02232.x

10.1346/CCMN.1978.0260601

Puffer, 1980, Distribution and origin of magnetite spherules in air, water and sediments of the greater New York city area and the north Atlantic Ocean, J. Sed. Petrol., 50, 247

Tunstall B.R. , Martin T. , Walker J. , Gill A.M. & Aston A. (1976) Soil temperatures induced by an experimental logpile fire; preliminary data analysis. CSIRO Aust. Div. Land Use Res. Tech. Mem. No. 76/20.

10.2136/sssaj1984.03615995004800060054x

Taylor, Soil Colloids and Their Associations in Soil Aggregates.

10.1346/CCMN.1984.0320302

Taylor, 1983, Soils: An Australian Viewpoint., 309

10.1180/claymin.1974.010.4.07

Maher B.A. Magnetic properties of some synthetic sub-micron magnetites. Geophys. J. Roy. Astr. Soc. (in press).

10.1180/claymin.1974.010.4.08

10.1007/978-94-011-8036-8