Fig. 5
From: Identifying an efficient, thermally robust inorganic phosphor host via machine learning
Crystal structure of NaBaB9O15. a Crystal structure of NaBaB9O15 viewed in [010] direction with the associated [BaO9], [NaO6], and [B3O7] polyhedral subunits highlighted. b The arrangement of the [B3O7]5– units generates large tunnels along the [001] direction, which are alternately filled by Ba2+ and Na+
