炭酸銅

定義

本品は、次の化学式で表される無機化合物である。

解説

炭酸水酸化銅 (II) ともいう。次の2形態がある。 (1) CuCO3・Cu(OH)2 (孔雀石型) 。緑色粉末で硫酸銅 (II) と炭酸ナトリウムの溶液を室温で混合することで得られる。比重 3.85。水，エチルアルコールに不溶。酸，アンモニア水に可溶。 (2) 2CuCO3・Cu(OH)2 。 (藍銅鉱型) 。青色粉末で比重 3.88。水に不溶。希酸，アンモニア水に可溶。湿った空気中に放置すると，緑色 (孔雀石型) へ徐々に変る。
ブリタニカ国際大百科事典 小項目事典 ブリタニカ

用途

鍍金用、顔料用

化粧品の成分用途

抗黴剤

化学的特性

Copper carbonate (basic), dark green monoclinic crystals, insoluble in cold H20, decomposes in H20, soluble in potassium cyanide. Malachite, copper ore, is of this composition. Refmed compound is used as a pigment.

物理的性質

Natural malachite is a dark green crystalline solid; monoclinic crystals; density 4.0 g/cm3; refractive index 1.655; decomposes at 200°C; insoluble in cold water and alcohols; decomposes in hot water; soluble in acids, ammonium hydroxide and potassium cyanide solutions. Natural azurite is blue monoclinic crystal; density 3.88 g/cm³shiz; refractive index 1.730; decomposes at 220°C; insoluble in cold water; decomposes in hot water; soluble in ammonium hydroxide and hot sodium bicarbonate solutions.

使用

Used to kill algae and as a pigment

製造方法

Basic carbonate is obtained from its naturally occurring minerals. It also may be prepared by mixing a solution of copper sulfate with sodium carbonate. The precipitate is then filtered and dried.

一般的な説明

Copper(II) carbonate basic is naturally found in azurite and malachite. On heating, it undergoes decomposition to form copper(II) oxide, carbon dioxide and water. Due to its high initial discharge capacity, copper(II) carbonate (basic) is being considered as a promising candidate as anode materials for lithium-ion batteries.

危険性

Toxic by ingestion.