The Crystal Structure of Ni4Mo
- 1 July 1944
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 12 (7) , 315-317
- https://doi.org/10.1063/1.1723945
Abstract
A nickel‐molybdenum alloy containing about 20 atom percent of molybdenum exists above 900°C as a cubic close‐packed structure. If this alloy is quenched and then held at temperatures below 840°C, an ordering reaction occurs which results in a slight tetragonal distortion of the cubic structure. This ordered structure requires for its description a tetragonal cell with 2.5 times the volume of the distorted face‐centered cubic cell. The completely ordered structure can be described analytically as follows: space group: C4h5—I4/m; dimensions of unit cell: a0=5.720A, c0=3.564A, c/a=0.6231; atomic positions: 2 Mo in 2(a), 8 Ni in 8(h), x=0.200. y=0.400.Keywords
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