how to >?
Asked by hrittik12d
25th October 2018,
11:26 PM
Answered by Expert
Answer:
|
Radius ratio
range
|
Co-ordination no. | Crystal structure |
| 0-0.115 | 2 | linear |
| 0.115-0.225 | 3 | triangular planar |
| 0.225-0.414 | 4 | tetrahedral |
| 0.414-0.732 | 6 | Octahedral |
| 0.732-0.999 | 8 | BCC |
| 1 | 12 | HCP |
Structure of crystal depends upon radius ratio.
| crystal | radis of cation(A') | radius of anion(A') |
radius ratio=
radius of cation/radius of anion
|
structure |
| RbCl | 1.48 | 1.95 | 1.48/1.95= 0.75897 | BCC |
| MgTe | 0.65 | 2.21 | 0.65/2.21= 0.29411 | Tetrahedral |
| MgO | 0.65 | 1.40 | 0.65/1.40= 0.4642857 | Octahedral |
| BaO | 1.35 | 1.40 | 1.35/1.40= 0.96428 | BCC |
Answered by Expert
28th October 2018,
3:43 PM
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