1) Oxide mineral 
Changbaiite (PbNb2O6) is a member of the oxide mineral class in which the mineral contains oxygen grouped with one or two metal ion. Changbaiite is classified as a multiple Oxide XY2O6 and it generally have ionic bond. Furthermore, it is also orthorhombic at a temperature of 25 °C and it changes to orthorhombic-tetragonal at 570 °C. ==Compositio...