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Verdigris is a collective term for copper acetate, whose chemical varieties produce different hues. The technical literature is inconsistent in describing these variations. Some sources refer to "neutral verdigris" as copper(II) acetate monohydrate (Cu(CH 3 CO 2) 2 ·(H 2 O)) and to "blue verdigris" as Cu(CH 3 CO 2) 2 ·CuO·(H 2 O) 6. [17]
Verdigris or Vert-de-Gris, is a blue-green, copper-based pigment. Its name comes from the natural pigments that form a patina on copper, bronze, and brass as it ages. [5] Oneexample is the green patina that formed on the Statue of Liberty in New York Harbor.
Unlike the copper(II) derivative, copper(I) acetate is colourless and diamagnetic. "Basic copper acetate" is prepared by neutralizing an aqueous solution of copper(II) acetate. The basic acetate is poorly soluble. This material is a component of verdigris, the blue-green substance that forms on copper during long exposures to atmosphere.
Verdigris – Carbonate of Copper or (more recently) copper(II) acetate. The carbonate is formed by weathering copper. The acetate is formed by vinegar acting on copper. One version was used as a green pigment. White arsenic – arsenious oxide, formed by sublimating arsenical soot from the roasting ovens.
The green patina that forms naturally on copper and bronze, sometimes called verdigris, usually consists of varying mixtures of copper chlorides, sulfides, sulfates, and carbonates, depending upon environmental conditions such as sulfur-containing acid rain.
Basic copper carbonate is a chemical compound, more properly called copper(II) carbonate hydroxide. It can be classified as a coordination polymer or a salt. It consists of copper(II) bonded to carbonate and hydroxide with formula Cu 2 (CO 3)(OH) 2. It is a green solid that occurs in nature as the mineral malachite.
Copper used in buildings, usually for roofing, oxidizes to form a green patina of compounds called verdigris. Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives.
Verdigris is a common term for copper(II) acetate, the green patina that forms on copper, brass and bronze, and which is used as a pigment. Verdigris may also refer to: Verdigris, Oklahoma; Verdigris, a Doctor Who novel; Verdigris, a play by Jim Beaver; Verdigris agaric, common name for the fungus Stropharia aeruginosa
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