What is red copper made of?

Red copper is composed of elemental copper.

Copper, also known as red copper is copper elemental, because its color is purplish red and named. See copper for various properties. Copper is industrial pure copper, its melting point is 1083℃, no isomerism transformation, the relative density of 8.9, five times of magnesium. The mass of the same volume is about 15% heavier than ordinary steel. Because of its rose red, the surface of the formation of oxide film is purple, so it is generally called red copper. It is copper containing a certain amount of oxygen, so it is also called oxygen-containing copper.

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