Does a divorce take effect with the statement "As long as you do not return, then you are divorced," with the intention of "If you do not return, then you are divorced"?

No divorce has occurred as long as the wife returned to the room and as long as the husband did not intend to finalize the divorce but rather intended to make it conditional on her not returning. This intention is valid between him and Allah. One must be careful about using divorce pronouncements during anger.