Void

Interstitial Voids||Planar Voids ||Triangular|| Square Planar Voids||Non Planar Voids ||Tetrahedral|| Octahedral||Cubical Voids||Ratio for each type OF void||Close packing in 3D||ABAB Packing||HCP Packing ABCABC||CCP Packing

Assertion:A tetrahedral void is surrounded by four spheres and an octahedral void is surrounded by six spheres. Reason:The number of tetrahedral voids is double the number of close packed spheres and number of octahedral voids is equal to number of close packed spheres.

Assertion : In hexagonal close packing vaccant space are between three touching spheres whose centes lie at the coeners of an equilateral traingle Reason :In hexagonal close packing voids are called voids are called square voids

In a crystalline solid, having formula AB_(2)O_(4) oxide ions are arranged in cubic close packed lattice while cations A are present in tetrahedral voids and cations B are present in octahedral voids. (a) What percentage of the tetrahedral voids is occupied by A? (b) What percentage of the octahedral voids is occupied by B ?

Which of the following statement is correct for a closet packed structure? (i) Each tetrahedral void is surrounded by 4 spheres and each sphere is surrounded by 8 tetrahedral voids. (ii) Each octahedral voids is surrounded by 6 spherus and each sphere is surrounded by 6 octahedral voids. (iii) The number of tetrahedral voids in a closest-packed arrangement is twice the number of spheres. (iv) The number of octahedral voids in a closest-packed arrangement is equal to the number of spheres.