sentence: Sulphates also occur where hot waters are forced through the rock, as with geysers.
sentences_before: These contain the sulphate group SO4. Sulphates commonly form in evaporites where highly salty waters slowly evaporate, allowing sulfates and halides to precipitate where the water evaporates.
concept_name: sulphate
headings: Minerals Chemical properties Definite chemical makeup Sulphates
categories: Natural resources