efficiency of packing in hcp

We have discussed earlier that in both type of close packing (hcp and ccp) approximately amount of the available volume is occupied by spheres (atom..

Efficiency of packing in hcp and ccp structures - We have discussed earlier that in both type of close packing (hcp and ccp) approximately amount of the available volume is occupied by spheres (atom..

Noble gases - All noble gases crystallize in ccp structure except helium which has hcp structur..

In two-dimensional packing, hexagonal close packing is more efficient. In three dimensions the second layer spheres are placed in the A voids and B voids are unoccupied. In the second layer there are C and D voids. The third layer is placed such that it covers the C v..

All noble gases crystallize in ccp structure except helium which has hcp structur..

a) Square close packing - Particles when placed in the adjacent rows show a horizontal as well as vertical alignment and form squares. b) Hexagonal close packing - Packing in every next row are placed in the depression between the particles of the first row. Hexagonal..

Summary - In photosynthesis, light energy is converted to chemical energy and carbon is fixed into organic compounds. Light energy is captured by the living world by means of pigments. The pigments involved in photosynthesis in eukaryotes include the chlorophyll and carotenoids. Light absorbed by t..

>Burning of sulphur or iron pyrites in oxygen is preferred to purified air since heat energy is wasted in heating the unreactive nitrogen component of the air. The mixture of sulphur dioxide and air obtained contains various impurities which must be removed; or else the catalyst loses its effi..