SILVER DICYANAMIDE, AGN(CN)2 - ORTHORHOMBIC MODIFICATION

M(r) = 173.9, orthorhombic, Pnma, a = 16.133 (8), b = 3.612 (2), c = 5.983 (3) angstrom, V/Z = 87.2 (1) angstrom 3, Z = 4, D(x) = 3.313 (4) g cm-3, Cu K-alpha radiation, lambda = 1.54178 angstrom, mu = 456 cm-1, F(000) = 320, T = 296 (2) K, R = 0.086 for 331 reflections. The structure consists of infinite chains, -Ag-N=C-N-C=N-Ag-, running parallel to the a direction. This is similar to the arrangement found in the trigonal form previously reported, except that the 3(1) axis along the chain is replaced here by a 2(1) axis. The interatomic distances and angles are not significantly different from those found in the trigonal form.