Corundum is

Structure OF Corundum || Structure OF Rutile || Structure OF Perovskite || Spinel and inverse Spinel || Defects in Crystal || Stoichiometric Defects in non-ionic Solids/ Vacancy Defects/ Interstitial Defects || Defects In Ionic Solids /Schottky Defects/Frenkel Defects

Match List - I with List - II {:(,"List - I",,"List - II"),((P),"Zinc blende structure",(1),"oxide ions in hcp and 2/3rd of octahedral voids occupied by the trivalent cation."),((Q),"Anti-fluorite structure",(2),"anion in FCC arrangement and alternate tetrahedral voids occupied by bivalent cation."),((R ),"Corundum structure",(3),"Oxide ions in face centres of cubic, bivalent cations in corners and one tetravalent cation ions."),((S),"Pervoskie structure",(4),"Anions in FCC and cations in all tetrahedral voids"):}

Corundum and carbonundum are respectively.:

In corundum, oxide ions are arranged in hcp array and the aluminum ions occupy two-thirds of octahedral voids. What is the formula of corundum ?

What is the CN of cation and anion in a corundum structure?

What is the CN of cation and anion in a corundum structure?