Citation: Hu, Zhang-Gui; Maramatsu, Kenichi; Kanehisa, N.; Yoshimura, M.; Mori, Y.; Sasaki, T.; Kai, Y. (2003). Reinvestigation of the crystal structure of barium aluminum borate difluoride, BaAlBO~3~F~2~, a new nonlinear optical material. Zeitschrift f\"ur Kristallographie - New Crystal Structures, 218, pp. 1-2.