tetrahedral InO45− ions was prepared. Reacting with a range of metal trioxides produces perovskites for example: In2O3 + Cr2O3 → 2 InCrO3 Applications Indium oxide is used in some types of batteries, thin film infrared reflectors transparent for visible light (hot mirrors), some optical coatings, and some antistatic coatings. In combination with tin dioxide, indium oxide forms indium tin oxide (also called tin doped indium oxide or ITO), a material used for transparent conductive coatings. In semiconductors, indium oxide can be used as an n-type semiconductor used as a resistive element in integrated circuits. In histology, indium oxide is used as a part of some stain formulations. See also Indium Indium tin oxide Magnetic semiconductor References Indium compounds Semiconductor materials Sesquioxides