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Low-temperature magnetic investigation of ankerite

Gerfried Hilscher, Peter Rogl, Josef Zemann and Theodoros Ntaflos
Low-temperature magnetic investigation of ankerite
European Journal of Mineralogy (February 2005) 17 (1): 103-105

Abstract

The magnetism of a very Fe-rich natural ankerite, Ca (sub 1.00) (Fe (sub 0.68) Mg (sub 0.23) Mn (sub 0.04) Ca (sub 0.04) )(CO (sub 3) ) (sub 2) , was investigated from 300 to 1.7 K. While the crystallographically related siderite orders antiferromagnetically below approximately 38 K, static long-range magnetic order does not appear for ankerite down to 1.7 K. The main cause of this different behaviour is thought tentatively to be due to the geometries of the Fe position in the two minerals. In siderite each Fe has six Fe neighbours at 3.73 Aa in the form of an elongated octahedron; in (ideal) ankerite each Fe again has six neighbours, but now at 4.83 Aa and in the form of a regular coplanar hexagon.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 17
Serial Issue: 1
Title: Low-temperature magnetic investigation of ankerite
Affiliation: Technical University of Vienna, Institute for Solid State Physics, Vienna, Austria
Pages: 103-105
Published: 200502
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 13
Accession Number: 2005-031134
Categories: General geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: University of Vienna, AUT, Austria
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200517
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