1 research outputs found
Possible Superhardness of CrB<sub>4</sub>
Chromium tetraboride [orthorhombic, space group <i>Pnnm</i> (No. 58), <i>a</i> = 474.65(9) pm, <i>b</i> = 548.0(1) pm, <i>c</i> = 286.81(5) pm, and <i>R</i> value (all data) = 0.041], formerly described in space
group <i>Immm</i>, was found not to be superhard, despite
several theory-based prognoses. CrB<sub>4</sub> shows an almost temperature-independent
paramagnetism, consistent with low-spin Cr<sup>I</sup> in a metallic
compound. Conductivity measurements confirm the metallic character