A practical and theoretical study of the formation of CaCO/sub 3/ in the presence of a magnetic field

Author

Kobe, S. ; Cefalas, A.C. ; Drazic, G. ; Sarantopoulou, E. ; McGuiness, P.J. ; Strazisar, J. ; Meden, A.

Author_Institution

Jozef Stefan Inst., Ljubljana, Slovenia

fYear

2003

fDate

March 30 2003-April 3 2003

Abstract

In this paper, we focus our study to follow systematically the influence of the magnetic field on the crystal form of calcium carbonate precipitated from low-concentration water solutions. By changing the strength of the field and the flow rate of the water through the system the calcite/aragonite/vaterite ratio varied. The crystal form and the particle size distribution of the precipitated calcium carbonate were determined by using X-ray analysis and HREM. The theoretical part of the work was to study the mechanism of the influence of magnetic field on the nucleation and further crystallisation of calcium carbonate. Starting from ab-initio calculations scaling can be explained easily on the basis of shape and energy position of the ground electronic states of calcite and aragonite.

Keywords

X-ray analysis; ab initio calculations; calcium compounds; crystal growth from solution; crystallisation; electron microscopy; nucleation; particle size; precipitation (physical chemistry); CaCO/sub 3/; CaCO/sub 3/ formation; HREM; X-ray analysis; ab-initio calculations; aragonite; calcite; crystallisation; flow rate; ground electronic states; low concentration water solutions; nucleation; particle size distribution; precipitation; Calcium; Impurities; Magnetic fields; Quantum mechanics; Tin;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2003. INTERMAG 2003. IEEE International

Conference_Location

Boston, MA, USA

Print_ISBN

0-7803-7647-1

Type

conf

DOI

10.1109/INTMAG.2003.1230559

Filename

1230559