Abstract
It was determined by considering the number of molecules in a unit cell of basic magnesium carbonate that the composition was 5 MgO·4CO2·5H2O. The other compositions reported previously are those of basic magnesium carbonate which containe as impurities: MgCO3·3H2O, Mg(OH)2 and amorphous material. CaCO3 in basic magnesium carbonate manufactured by different process is found in the type of calcite or aragonite. From the point of the use of this material, the state analysis of basic magnesium carbonate by X-ray diffractometer is more useful than ordinary chemical analysis, and the method was examined.
