**Definition:**

Data items in the CELL_WAVE_VECTOR category list the independent modulation wave vectors q~i~. The diffraction vectors are indexed in the form ha*+kb*+lc*+sum~i~ (m~i~q~i~). sum~i~ is taken over all wave vectors. In this version of the dictionary, the index i has been restricted to be less than 9.

Example 1 - example corresponding to the one-dimensional incommensurately
modulated structure of K~2~SeO~4~.
loop_ _cell_wave_vector_seq_id _cell_wave_vector_x 1 0.318(5) |

**Type:** null

**Category:** category_overview

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