|  | |  |  |  | calculates the extinction distance of the  reflection for  at the stored wavelength. | 
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|  | |  |  |  | calculates the extinction distance of the  reflection for  at wavelength . | 
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|  | | [crystal,λ,{{,,},{,,},…}] |  |  | calculates the extinction distance of the  reflections for  at wavelength . | 
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|  | |  |  |  | calculates the extinction distance of the  reflection for  at wavelength , using the factors  and  of the experimental setup. | 
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