Langite is a rarely used term that refers to a copper sulfate mineral. Synonyms for langite include copper sulfate pentahydrate, blue vitriol, and chalcanthite. These synonyms are often used interchangeably when discussing mineral specimens or scientific research involving copper sulfate compounds. Blue vitriol derives its name from the striking blue color of copper sulfate crystals, while chalcanthite comes from the Greek word for copper and flower, due to its delicate and intricate crystal formations. These synonyms for langite are useful in providing a variety of terms for describing the same substance, allowing for more accurate and varied scientific communication.