Changoite is a rare zinc sulfate mineral with the formula Na<sub>2</sub>Zn(SO<sub>4</sub>)<sub>2</sub>÷4H<sub>2</sub>O. Chagoite was discovered in the San Francisco Mine near Sierra Gorda, Antofagasta, Chile. The mineral is a zinc-analogue of blödite, cobaltoblödite, manganoblödite and nickelblödite - other representatives of the blödite group. In terms of chemistry changoite is somewhat similar to gordaite. The mineral's name comes from the Chango people, a group of early inhabitants of northern Chile.
Traces of magnesium and calcium in changoite are negligible.
Minerals associating with changoite are gypsum, zinc-bearing paratacamite, and thénardite.