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Topic: Lanthanide coordination  (Read 1819 times)

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Offline elt2112

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Lanthanide coordination
« on: May 11, 2015, 01:35:22 PM »
Explain why lanthanum is 11 coordinate in LaF3, whilst lutetium is 9 coordinate in LuF3, but 6 coordinate in LuCl3.

So I'm guessing the fact that lutetium 3+ has a significantly smaller ionic radius would account for the fact it has a smaller coordination number. But what reason is there for the difference between LuF3 and LuCl3? Would it be because chlorine is larger than fluorine?

Offline mjc123

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Re: Lanthanide coordination
« Reply #1 on: May 11, 2015, 06:08:22 PM »
Yes

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