How many oxygen atoms are in 2.30g of quartz?
Quartz and halite are minerals, feldspar is a group of minerals. Quartz and feldspar are very common minerals in many types of rock, and halite is restricted to marine sedimentary rocks. Your question is a bit on the vague side. Do you mean isolating hazardous materials? If so, it would depend on the specifics of the hazardous material and the specific rock formation, in particular the solubility and porosity.
Quartz is very stable. Halite is ionic, it will dissolve in water but not oil. Salt domes are one place that there's oil to drill for.
