**Definition:**

The reciprocal-cell lengths in inverse angstroms. These are related to the real cell by: recip-a = b*c*sin(alpha)/V recip-b = c*a*sin(beta)/V recip-c = a*b*sin(gamma)/V where V is the cell volume. Ref: Buerger, M. J. (1942). X-ray Crystallography, p. 360. New York: John Wiley & Sons Inc.

The permitted range is 0.0 -> infinity

**Type:** numb

**Category:** cell

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