| Samarium(Sm) | 150.4 | 19.95 (cm3/mol) | 11/30/1879 | s | 1,345.2 (K) | 2,073 (K) | 1.17 | 50 (kJ/mole) | 2,8,18,24,8,2 | [Xe] 4f6 6s2 | cp: cls pkd (ABCBCACAB) | alloys, headphones | ... | vigorous, =>Sm2O3 | 7 | SmH2 SmH3 | Sm2O3 | SmCl2 SmCl3 |  | 13.3 J/m-sec-deg | 11 1/mohm-cm | 28.8 (A^3) | Monazite(phosphate),bastnaesite | .8 (log) | 130 $/100g | $/100g | - (-) | 7 (7) |
| Terbium(Tb) | 158.925 | 19.2 (cm3/mol) | 11/30/1842 | s | 1,633.2 (K) | 3,073 (K) | 1.21 | 50 (kJ/mole) | 2,8,18,27,8,2 | [Xe] 4f9 6s2 | hcp: hexagonal close pkd | alloys | soft | vigorous, =>Tb4O7 (approx.) | 1 | TbH2 TbH3 | TbO2 Tb4O7 | TbCl3 |  | 11.1 J/m-sec-deg | 8.8 1/mohm-cm | 25.5 (A^3) | Monazite(phosphate),bastnaesite | (log) | 1800 $/100g | $/100g | - (-) | 8 (8) |
| Thulium(Tm) | 168.934 | 18.1 (cm3/mol) | 11/30/1878 | s | 1,818.2 (K) | 2,000 (K) | 1.25 | 50 (kJ/mole) | 2,8,18,31,8,2 | [Xe] 4f13 6s2 | hcp: hexagonal close pkd | alloys | soft | vigorous, =>Tm2O3 | 1 | TmH2 TmH3 | Tm2O3 | TmCl2 TmCl3 |  | 16.9 J/m-sec-deg | 13.5 1/mohm-cm | 21.8 (A^3) | Monazite(phosphate),bastnaesite | -0.3 (log) | 4100 $/100g | $/100g | - (-) | 9 (9) |
| Ytterbium(Yb) | 173.04 | 24.79 (cm3/mol) | 11/30/1878 | s | 1,097.2 (K) | 1,700 (K) | 1.21 | 50 (kJ/mole) | 2,8,18,32,8,2 | [Xe] 4f14 6s2 | fcc: face-centered cubic | alloys | soft | vigorous, =>Yb2O3 | 7 | YbH2 Yb2H5 | Yb2O3 | YbCl2 YbCl3 |  | 34.9 J/m-sec-deg | 35.7 1/mohm-cm | 21 (A^3) | Monazite(phosphate),bastnaesite | .5 (log) | 530 $/100g | $/100g | - (-) | 6 (6) |
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