Nd2Fe14B crystal structure (P42/mnm #136 expanded to P1, 68 atoms). Coordinates from Herbst/Croat/Pinkerton (1984): a=8.807, c=12.207. 8 Nd (4f+4g), 56 Fe (16k1+16k2+8j1+8j2+4e+4c), 4 B (4g). Decisive test for ALIGNN magnetic sublattice density hypothesis.