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Old Dec 31st 2018, 03:51 AM   #1
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Radii of host and dppant

Should radii of host and dopant elements be the same for dopping reaction? What will be its effect on reaction for same radii and for different radii?
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Old Jan 2nd 2019, 10:38 AM   #2
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You want the dopant to fit nicely into the crystal structure of the host material,
thus you want the radii to be as similar as possible.
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Old Jan 2nd 2019, 11:39 AM   #3
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Originally Posted by Woody View Post
You want the dopant to fit nicely into the crystal structure of the host material,
thus you want the radii to be as similar as possible.
I suck at SSP but I do remember one thing: Normally the radius of the dopant has to be somewhat close to the host atom that you are replacing, as you say. But there can be advantages in using a dopant that does not do this. As I recall you can sometimes construct a piezo-electric structure by introducing a dopant that has a much larger radius than the host element.

But that's pretty much all I know about it.

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