unit_cell_skew (
        alpha,
        beta,
        gamma,
        )

Angle arguments must be in radians.

unit_cell_axes (
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )

Angle arguments must be in radians.

cell_center (
        grid_origin,
        axes,
        interior_point,
        )

Find center of cell in unit cell grid containing specified point.

space_group_matrices (
        space_group,
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )

Angle arguments must be in radians.

cell_origin (
        grid_origin,
        axes,
        interior_point,
        )

Compute the corner position of unit cell containing a specified point. The grid_origin is specified in crystallographic coords (ie the axes basis).

unit_cell_to_xyz_matrix (
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )

Angle arguments must be in radians.

close_packing_matrices (
        tflist,
        ref_point,
        center,
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )