Definition of Copper Carbonate

Update:27-12-2018
Summary:

Basic Copper Carbonate is a compound, CuCO3, that was u […]

Basic Copper Carbonate is a compound, CuCO3, that was used as a sulfide scavenger for water-based muds. It was found to be corrosive due to spontaneous plating of metallic copper onto metal surfaces, causing pitting corrosion; it has largely been replaced by zinc compounds. At ambient temperatures, is an ionic solid (a salt) consisting of copper(II) cations Cu2+ and carbonate anions CO23.

Copper Carbonate has a fairly complex decomposition. The accompanying curve shows the history of weight loss as this material is fired. It is interesting to compare this chart with the one for Copper Hydroxide to see the difference in the amount of weight loss, and when and how fast it occurs.

The terms “copper carbonate”, “copper(II) carbonate”, and “cupric carbonate” almost always refer to a basic copper carbonate or copper(II) carbonate hydroxide, such as Cu2(OH)2CO3, which occurs naturally as the mineral malachite or Cu3(OH)2(CO3)2 (azurite). For this reason, the qualifier neutral may be used instead of “basic” to refer specifically CuCO3.

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