Copper(II) carbonate (often called copper carbonate or cupric carbonate) is a blue-green compound (chemical formula CuCO₃) forming most of the patina one sees on weathered brass, bronze, and copper. The color can vary from bright blue to green, because there may be a mixture of both copper carbonate and basic copper carbonate in various stages of hydration. It was formerly much used as a pigment, and is still in use for artist's colours. It has also been used in some types of make-up, like lipstick, although it can also be poisonous to humans. It also has been used for many years as an effective algaecide in farm ponds and in aquaculture operations. Image File history File links Basic_copper(II)_carbonate. ... IUPAC nomenclature is a systematic way of naming organic chemical compounds. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A substance is soluble in a fluid if it dissolves in that fluid. ... Water (H2O, HOH) is the most abundant molecule on Earth, composing 70-75% of the Earths surface as liquid and solid state in addition to being found in the atmosphere as a vapor. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... The Statue of Liberty gets its green color from the patina formed on its copper surface Patinas are chemical compounds formed on the surface of metals. ... Brass is the term used for alloys of copper and zinc in a solid solution. ... Assorted ancient bronze castings found as part of a cache, probably intended for recycling. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance metallic brown Atomic mass 63. ... In chemistry, hydration is the condition of being combined with water. ... For animal and plant pigments, see Pigment, biology. ... Lipstick Lipstick is a cosmetic product for the lips that is richer in color and texture than lip gloss, pirmarily used to apply color to the lips. ...

Copper carbonate decomposes at high temperatures, giving off carbon dioxide and leaving copper(II) oxide. Carbon dioxide is an atmospheric gas comprised of one carbon and two oxygen atoms. ... Copper(II) oxide Copper(II) oxide or cupric oxide (CuO) is the higher oxide of copper. ...

CuCO₃(s) ---> CuO(s) + CO₂(g)

Basic copper(II) carbonate occurs naturally as malachite (CuCO₃.Cu(OH)₂) and azurite (Cu₃(CO₃)₂(OH)₂). Malachite from the Democratic Republic of Congo Malachite is a carbonate mineral, copper(II) carbonate hydroxide Cu2CO3(OH)2. ... Fresh, unweathered stalactitic azurite crystals showing the exceptionally deep blue of unaltered azurite. ...

External links

• National Pollutant Inventory - Copper and compounds fact sheet

• Link page to external chemical sources.