Molecular formula:mnco3. molecular weight:114,95 manganese carbonate is pale pink crystals, in the presence of oxygen and water becomes brown. it is used to produce manganese oxide, siccative, ferromanganese, mirror cast iron, a component of... Mnco3 was synthesized by co-precipitation method using mnso4.h2o as a manganese source and using various carbonate precursors, such as (nh4)hco3, (nh4)2co3, k2co3, li2co3, nahco3 and na2co3. in a typical synthesis, aqueous solution of 0.1 m mnso4.h2o and 0.12 m carbonate precursor in an equal amount was mixed and stirred for 10 minutes. Alibaba offers 2,518 high purity manganese carbonate suppliers, and high purity manganese carbonate manufacturers, distributors, factories, companies. there are 238 oem, 44 odm, 15 self patent. find high quality high purity manganese carbonate suppliers on alibaba. Highly reduced graphene oxide (hrg) nanocomposites of manganese carbonate doped with (1%) zirconia (zro x) nanoparticles [zro x (1%)–mnco 3 /(x%)hrg (where x = 0–7)] were prepared employing a facile co-precipitation method in which the percentage of hrg was varied. the resulting nanocomposite was calcined at 300 °c.