unique# ReciprocalLatticeVector.unique(use_symmetry=False, return_index=False)[source]# The unique vectors. Parameters: use_symmetry (bool, optional) – Whether to consider equivalent vectors to compute the unique vectors. Default is False. return_index (bool, optional) – Whether to return the indices of the (flattened) data where the unique entries were found. Default is False. Returns: ReciprocalLatticeVector – Flattened unique vectors. idx (numpy.ndarray) – Indices of the unique data in the (flattened) array.