Complex sentence: Akhtenskite (Manganese Smoker) is a mineral with the chemical formula of MnO 2 that was named after the Akhtensk deposit in Russia, where it was first discovered and noted in 1979.
Split into simpler sentences: Akhtenskite (Manganese Smoker) is a mineral with the chemical formula of MnO 2 that was named after the Akhtensk deposit. The deposit can be found in Russia, where it was first discovered and noted in 1979.