| Holmium(Ho) | 164.93 | 18.7 (cm3/mol) | 11/30/1878 | s | 1,743.2 (K) | 2,873 (K) | 1.23 | 50 (kJ/mole) | 2,8,18,29,8,2 | [Xe] 4f11 6s2 | hcp: hexagonal close pkd | alloys | ... | vigorous, =>Ho2O3 | 1 | HoH2 HoH3 | Ho2O3 | HoCl3 |  | 16.2 J/m-sec-deg | 11.4 1/mohm-cm | 23.6 (A^3) | Monazite(phosphate),bastnaesite | .1 (log) | 740 $/100g | $/100g | - (-) | 8 (8) |
| Lutetium(Lu) | 174.96 | 17.78 (cm3/mol) | 11/30/1906 | s | 1,929.2 (K) | 3,600 (K) | 1.27 | 50 (kJ/mole) | 2,8,18,32,9,2 | [Xe] 4f14 5d1 6s2 | hcp: hexagonal close pkd | alloys | ... | vigorous, =>Lu2O3 | 2 | LuH2 LuH3 | Lu2O3 | LuCl3 |  | 16.4 J/m-sec-deg | 16.7 1/mohm-cm | 21.9 (A^3) | Monazite(phosphate),bastnaesite | -0.3 (log) | 6900 $/100g | $/100g | - (-) | 9 (9) |
| Neodymium(Nd) | 144.24 | 20.6 (cm3/mol) | 11/30/1884 | s | 1,283.2 (K) | 3,300 (K) | 1.14 | 50 (kJ/mole) | 2,8,18,22,8,2 | [Xe] 4f4 6s2 | cp: close packed (ABCB) | alloys, Welder's mask | ... | vigorous, w/ht =>Nd2O3 | 7 | NdH2 NdH3 | Nd2O3 | NdCl2 NdCl3 |  | 16.5 J/m-sec-deg | 15.4 1/mohm-cm | 31.4 (A^3) | Monazite(phosphate),bastnaesite | 1.4 (log) | 110 $/100g | $/100g | - (-) | 7 (7) |
| Praseodymium(Pr) | 140.908 | 20.8 (cm3/mol) | 11/30/1884 | s | 1,204.2 (K) | 3,293 (K) | 1.13 | 50 (kJ/mole) | 2,8,18,21,8,2 | [Xe] 4f3 6s2 | cp: close packed (ABCB) | alloys, Welder's mask | soft | vigorous, =>Pr6O11 approx | 1 | PrH2 PrH3 | PrO2 Pr6O11 | PrCl3 |  | 12.5 J/m-sec-deg | 14.706 1/mohm-cm | 28.2 (A^3) | Monazite(phosphate),bastnaesite | .9 (log) | 170 $/100g | $/100g | - (-) | 6 (6) |
| Promethium(Pm) | ... | 22.39 (cm3/mol) | 11/30/1944 | s | 1,353.2 (K) | ... | 1.15 | 50 (kJ/mole) | 2,8,18,23,8,2 | [Xe] 4f5 6s2 | cp: close packed (ABCB) | nuclear battery | Radioactive | vigorous, =>Pm2O3 | | ... | Pm2O3 | ... |  | 17.9 J/m-sec-deg | 1/mohm-cm | 30.1 (A^3) | Synthetic | -19.3 (log) | $/100g | $/100g | l (l) | 6 (6) |
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