| Cerium(Ce) | 140.12 | 20.67 (cm3/mol) | 11/30/1802 | s | 1,071.2 (K) | 3,743 (K) | 1.12 | 50 (kJ/mole) | 2,8,18,20,8,2 | [Xe] 4f2 6s2 | fcc: face-centered cubic | self-cleaning ovens(CeO2) | malleable | vigorous, w/ht =>CeO2 | 4 | CeH2 CeH3 | Ce2O3 CeO2 | CeCl3 |  | 11.3 J/m-sec-deg | 13.333 1/mohm-cm | 29.6 (A^3) | Monazite(phosphate),bastnaesite | 1.8 (log) | 57 $/100g | $/100g | 0 | 6 (6) |
| Dysprosium(Dy) | 162.5 | 19. (cm3/mol) | 11/30/1885 | s | 1,682.2 (K) | 2,873 (K) | 1.2 | 50 (kJ/mole) | 2,8,18,28,8,2 | [Xe] 4f10 6s2 | hcp: hexagonal close pkd | alloys, CD disk | neutron absorber | vigorous, =>Dy2O3 | 7 | DyH2 DyH3 | Dy2O3 | DyCl2 DyCl3 |  | 10.7 J/m-sec-deg | 10 1/mohm-cm | 24.5 (A^3) | Monazite(phosphate),bastnaesite | .5 (log) | 210 $/100g | $/100g | - (-) | 8 (8) |
| Erbium(Er) | 167.26 | 18.4 (cm3/mol) | 11/30/1842 | s | 1,795.2 (K) | 3,173 (K) | 1.24 | 50 (kJ/mole) | 2,8,18,30,8,2 | [Xe] 4f12 6s2 | hcp: hexagonal close pkd | alloys, photogr. filter | ... | vigorous, =>Er2O3 | 6 | ErH2 ErH3 | Er2O3 | ErCl3 |  | 14.5 J/m-sec-deg | 14.1 1/mohm-cm | 22.7 (A^3) | Monazite(phosphate),bastnaesite | .4 (log) | 270 $/100g | $/100g | - (-) | 9 (9) |
| Europium(Eu) | 151.96 | 28.9 (cm3/mol) | 11/30/1900 | s | 1,095.2 (K) | 1,712 (K) | 1.12 | 50 (kJ/mole) | 2,8,18,25,8,2 | [Xe] 4f7 6s2 | bcc: body-centered cubic | alloys, color TV phosphor | hard | vigorous, =>Eu2O3 | 2 | EuH2 | Eu2O3 | EuCl2 EuCl3 |  | 13.9 J/m-sec-deg | 11 1/mohm-cm | 27.7 (A^3) | Monazite(phosphate),bastnaesite | .1 (log) | 3600 $/100g | $/100g | - (-) | 5 (5) |
| Gadolinium(Gd) | 157.25 | 19.9 (cm3/mol) | 11/30/1879 | s | 1,584.2 (K) | 3,273 (K) | 1.17 | 50 (kJ/mole) | 2,8,18,25,9,2 | [Xe] 4f7 5d1 6s2 | hcp: hexagonal close pkd | alloys, CD disk | ... | vigorous, =>Gd2O3 | 7 | GdH2 GdH3 | Gd2O3 | GdCl3 |  | 10.5 J/m-sec-deg | 7.9 1/mohm-cm | 23.5 (A^3) | Monazite(phosphate),bastnaesite | .7 (log) | 191 $/100g | $/100g | - (-) | 7 (7) |
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