Problems |
| 17.1) |
For the tetragonal ( four spheres whose centers coincide with the corners of a square and which are such that each sphere is touching two adjacent spheres ) and pentagonal coordination, estimate the critical radius ratios for the spheres that can be accommodated in the void space available. Treat the problem as a planar problem as this is much simpler . |
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| 17.2) |
We have given a few examples of triangular, cubic and other coordinations. From web-sites / literature, give another distinct example for each one of these coordinations. |
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| 17.3) |
When we go from planar to non - planar coordination in exercise 17.1 above, does the critical radius ratio increase or decrease ? |
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| 17.4) |
Find the critical radius ratio for cubic coordination. |
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