U diamond LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 8.71707454324 Warning: Maximum number of function evaluations has been exceeded. C11 = -510554.857404 +/- 0.007336 GPa C12 = 24.174005 +/- 0.005187 GPa C44 = -191457.814889 +/- 0.001834 GPa B = -170168.836464 +/- 0.004235 GPa