Title :
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
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;
Conference_Titel :
Magnetics Conference, 2003. INTERMAG 2003. IEEE International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7647-1
DOI :
10.1109/INTMAG.2003.1230559
