“…The scatter is quite large (cf . Table II where experimental [1,14,16,18,17,20,[22][23][24][25][26] and theoretical [27][28][29] data are collected), illustrating the experimental and computational difficulties for this material. However, if the results for diamond powders (including the present result) and single crystals are distinguished, one easily observes that the TEC value at 300 K is by up to 30% higher for powders.…”