비스무트섭카르본산염

Bismuth subcarbonate (Bi₂O₂CO₃), also known as basic bismuth(III) carbonate or dibismuth carbonate dioxide, is a white to slightly yellowish, odourless, and tasteless powder that gradually darkens upon exposure to light. It has a relative density of 6.86 and is insoluble in water, ethanol, and most organic solvents. It is readily soluble in nitric acid, hydrochloric acid, and glacial acetic acid; soluble in ammonium chloride solution; and slightly soluble in alkali metal carbonate solutions. It decomposes at approximately 308 °C, yielding bismuth oxide and carbon dioxide upon heating.

Bismuth oxycarbonate is prepared by adding sodium carbonate to a suspension of bismuth subnitrate in water.BiONO3 + Na2CO3 → (BiO)2CO3 + 2NaNO3(BiO)2CO3also may be prepared by adding ammonium carbonate to a solution of bismuth salt. The nature of the product in the preparative processes depends on the nature of the subnitrate or the bismuth salt used, the amount of water and the temperature.