In corundum, oxide ions are arranged in hexagonal close packing and aluminium ionsa occpy tow-third of the octaheral voids. What is the formula of corrundum ? .

(i) In corundum, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two third of octahedral voids. What is the formula of corundum ? (ii) The unit cell of silver iodide (Agl) has 4 iodine atoms in it. How many silver atoms must be there in the unit cell ?

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

In sapphire, oxide ions are arranged in hexagonal close packing and aluminium ions occupy two-thirds of the octahedral voids. What is the formula of sapphire?

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 ?

In corrundum, oxid ions are arranged in h.c.p. array and the aluminum ions occupy two - thirds of octahedral voids. What is the formula of currundum ?