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.
 
To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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