How to Calculate Angles Between Crystal Planes Using Miller Indices?

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i want the formula of Angles Between crystal Planes by knowning the information of Miller Indices of that planes?

please help me
 
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depends on if you have a cubic cell, or tetragonal etc..
 
malawi_glenn said:
depends on if you have a cubic cell, or tetragonal etc..

for all of them please.
 
For a cubic system you can normalize the MIs to get the direction cosines of the normal to the plane. After that, it's just a matter of taking a dot product.
 
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