The Ni-B system has been investigated with X-ray powder and single-crystal methods in the range Ni3B-NiB. In addition to the previously known intermediate phases, Ni3B, Ni2B, and NiB, the existence of two other phases, both with the ideal compositions Ni4B3, but one orthorhombic and the other monoclinic, has been established. The following two-phase regions have been found: Ni3B + Ni2B, Ni2B + orthorhombic Ni4B3, orthorhombic Ni4B3 + monoclinic Ni4B3, and monoclinic Ni4B3 + NiB. The unit cell of orthorhombic Ni4B3 varies slightly with composition: the dimensions in two phase Ni2B + orthorhombic Ni4B3 alloys are the following: a = 11.953 A, b = 2.981 A, c = 6.569 A and in two-phase orthorhombic Ni4B3 + monoclinic Ni4B3 alloys: a = 11.973 A, b = 4.882, c = 7.818 A, Beta = 103.12. No unit cell vatiation of the lattice parameter has been found.
CITATION STYLE
Rundqvist, S., Hauge, S., Fex, H., Högberg, B., Kneip, P., & Palmstierna, H. (1959). An X-Ray Investigation of the Nickel-Boron System. The Crystal Structures of Orthorhombic and Monoclinic Ni4B3. Acta Chemica Scandinavica, 13, 1193–1208. https://doi.org/10.3891/acta.chem.scand.13-1193
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