Abstract
Magnesite single crystals up to 250 microns were synthesized from an equi-molar solution of MgCl2 and Na2CO3 in the micro-autoclave at 180-20$0^{\circ}C$. The lattice constant of synthetic magnesite was obtained a=4.6369(7), c=15.0230(10)A.U. by a least squares analysis based on the UNICS Program (Sakurai 1967) was applied to 28 reflections. Results of X-ray powder diffraction and of DTA, TGA, IRA, and EPMA studies indicate that synthesized magnesite has properties to those of natural magnesite.