Abstract
Vanadium substituted Mo2–xNi1–xV2xB2 (x = 0 and 0.45) was prepared by reaction boronizing sintering and investigated using X-ray powder diffraction. Structure of Vanadium substituted Mo2–xNi1–xV2xB2 was determined using the Rietveld method. The results show that the crystal structure of vanadium substituted Mo2NiB2 has changed from orthorhombic to tetragonal. The crystal structure of Mo2NiB2 belongs to the structure type W2CoB2 with space group Immm (No. 71). The unit-cell lattice parameters are a = 7.0914(2) A, b = 4.5639(9) A, c = 3.1787(8) A. The reliability factor for the refinement is Rp = 6.74% and Rwp = 8.52%. The crystal structure of vanadium substituted Mo2NiB2 belongs to space group P4/mbm (No. 127). The lattice parameters are a = b = 5.8244(5) A, c = 3.1239(6) A. The reliability factor is Rp = 5.69% and Rwp = 7.41%.
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