Rb fcc Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Rb__MO_754498969542_002 7.31268417835 Warning: Maximum number of function evaluations has been exceeded. C11 = 2.609001 +/- 0.007336 GPa C12 = 1.768677 +/- 0.005187 GPa C44 = 1.816026 +/- 0.001834 GPa B = 2.048785 +/- 0.004235 GPa