Question
Differentiate between tetrahedral voids and octahedral voids.
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Answer
Differentiate between tetrahedral voids and octahedral voids
| Tetrahedral Voids | Octahedral Voids |
| These voids are surrounded by four spheres which lie at the vertices of a regular tetra-hedron. There are two tetra-hedral voids per atom in a crystal and the radius ratio is 0.225. | These voids are surrounded by six spheres and formed by a combination of two triangular voids of the first and second layer. There is one octahedral void per atom in a crystal. The radius ratio $\left(\frac{r_{\text {void }}}{r_{\text {sphere }}}\right)$ is 0.414. |
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