Changoite
Changoite is a rare nickel mineral with the formula Na2Zn(SO4)2•4H2O. Chagoite was discovered in 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. Mineral's name comes from the early inhabitants of Chile - Changos.