Citation: Kaduk, J.A.; Wong-Ng, W.; Greenwood, W.; Dillingham, J.; Toby, B.H. (1999). Crystal structures and reference powder patterns of Ba R2 Zn O5 (R = La, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er and Tm). Journal of Research of the National Institute of standards and Technology, 104, pp. 147-171.