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Solid State IX
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Interstitial sites in close packed structures

Shaillee Kaushal is teaching live on Unacademy Plus

Shaillee Kaushal
Faculty in Chemistry with a teaching experience of 14 years. Specialised in teaching for boards and competitions.

Unacademy user
Very helpful initiative . Please continue.
  1. XII 01 Solid State IX

  2. Tetrahedral site: - When one sphere is pla upon the three other spheres w are touching each other, tetrah structure is formed. ed ch ral hole hole This site is very small as compared to the size of the pheres. In hcp and ccp, each sphere is in contact with three spheres abov and three spheres below. hole hole There are two tetrahedral site associates with each sphere.

  3. Octahedral site: This site is formed at the centre of six spheres. >Each octahedral site is formed by superimposing two equilateral triangles with apices in opposite directions. There is one octahedral site for each sphere. The octahedral sites are half of tetrahedral sites.