[CHEKAL]

how would i index reflections from xray diffraction using the base factor? i have an impossible reflection at 1.5 with the given data, the base factor has be calculated with a given reflection.

[Gibbs]

You need a new base factor. So, your smallest 2θ is giving a ratio of 1, you now need to change that to a ratio of 2. The Miller indices will change from 100 to 110. Now you can calculate a new base factor by taking sin²θ/2 This is new base factor. Then divide your sin²θ for the 1.5 ratio and you should then get an integer or close to integer value.