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. 2014 Sep 8;470(2169):20140371. doi: 10.1098/rspa.2014.0371

Table 2.

Materials properties: Debye temperature ΘD, atomic mass M, atomic volume V , mean zone-centre velocity v and umklapp extinction temperature ΘU.

material ΘD (K) M (g mol−1) V (m3) v (m s−1) ΘU (K)
Si 645 28.086 20.01×10−30 6272 126
Ge 375 72.63 22.75×10−30 3923 70
C 1850 12 5.67×10−30 13 746 405
α-Sn 230 118.69 34.05×10−30 2769 37