Volume 155, Number 1 (2000) in the article “Yb5In2Sb6: A New Rare Earth Zintl Phase with a Narrow Band Gap,” by Sung-Jin Kim, John R. Ireland, Carl R. Kannewurf, and Mercouri G. Kanatzidis, pages 55–61 ():
K8Ce2I18O53 shows the highest visible light driven photocatalytic activity among rare earth iodates due to asynergistic effect between the narrow band gap and polar zero-dimensional [Ce(IO3)8]4− units.