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### How to calculate radius ratio triangular voids?

The triangular voids are found in the planes of the close packed structures, whenever three spheres are in contact in such a fashion. Coordination number of triangular void is three. Here three atoms A, B, and C form triangular voids in which equilateral triangle form having angle 600

WhereR= Radius of the (Atoms) sphere= maximum radius of a sphere that can be placed inside the void or radius of void.