International
Tables for
Crystallography
Volume D
Physical properties of crystals
Edited by A. Authier

International Tables for Crystallography (2006). Vol. D. ch. 3.1, p. 367

Figure 3.1.5.12 

J. F. Scottc*
[Figure 3.1.5.12]
Figure 3.1.5.12

Structure of the tungsten bronze barium sodium niobate Ba2NaNb5O15 in its highest-temperature [P4/mbm] phase above 853 K.