It is often accompanied by anhydrite, carnallite, halite, and kieserite. Gunningite is the zinc member of the kieserite group of minerals. The European Space Agency's Mars Express found evidence of perhaps epsomite and kieserite. Kieserite is a monohydrate and is common among evaporitic deposits. Magnesium sulphate, or kieserite, is often used as an alternative to baking soda. The European Space Agency's Mars Express found possible evidence of the sulfates epsomite and kieserite. Kieserite commonly occurs in marine evaporites and rarely in volcanic environments as a sublimate.