P. Hohn et R. Kniep, Crystal structure of the high temperature phase of tribarium [tetranitridotungstate(VI)], HT-Ba-3[WN4], Z KRIST-NEW, 215(3), 2000, pp. 329-330
Ba3N4W, trigonal, P31c (No, 159), a = 18.473(2) Angstrom, c = 10.427(1) Ang
strom, V = 3081.6 Angstrom(3), Z = 18, R-gt(F) = 0.045, wR(ref)(F-2) = 0.09
7, T = 293 K.