Cu3(AsO4)2, known as chalcanthite, is a chemical compound composed of copper, arsenic, and oxygen. It typically appears as a blue or green crystalline solid and is often found in mineral deposits. This compound is of interest in mineralogy and can be formed through the oxidation of copper ores. In addition to its mineralogical significance, Cu3(AsO4)2 has applications in various fields, including metallurgy and environmental science. Its properties are studied for potential uses in arsenic removal from water and in the production of copper-based materials.