C18H13AgN6O4, monoclinic, C2/c (no. 15), a = 12.9022(12) angstrom, b = 8.9088(8) angstrom, c = 15.3383(14) angstrom, beta = 106.810(3)degrees, V = 1687.7(3) angstrom(3), Z = 4, R-gt(F) = 0.0247, wR(ref)(F-2) = 0.0600, T = 296(2) K.