Metal excess defect due to the presence of extra cations

Last updated: 7/3/2023

Metal excess defect due to the presence of extra cations interstitial sites Zinc oxide is white in colour at room temperature On heating it loses oxygen and turns yellow y mg Si Zno heating 1 Zn O 2e 2 2 Now there is excess of zinc in the crystal and its formula becomes 1 xO The excess Zn ions move to interstitial sites and the electrons neighbouring interstitial sites