Figure 1
The crystal structure of thiourea under ambient conditions (phase V, Pnma) refined on the basis of neutron diffraction intensities (Mullen et al., 1978). Dark-brown spheres at the centres of the molecules are carbon, large yellow spheres are sulfur, medium-sized pale-blue spheres are nitrogen and small pink spheres are hydrogen. The unit-cell parameters are a = 7.657 (4) Å, b = 8.588 (5) Å and c = 5.485 (3) Å. |