| # | Species | Formula |
| 6496 | Lanthanum(III) hexaiodide | I6La | |
| 6497 | Lanthanum, dimer (Geo) | La2 | |
| 6498 | Lanthanum, dimer | La2 | |
| 6499 | Lanthanum complex, CCDC: EBEGOH (Geo) | C48H46N4O12La2 | |
| 6500 | Lanthanum complex, CCDC: PUWZIQ (Geo) | C54H58N4O12La2 | |
| 6501 | Lanthanum complex, CCDC: HUFQOO (Geo) | C66H46N4O12La2 | |
| 6502 | Lanthanum complex, CCDC: TEQBOG (Geo) | C38H26N4O14La2 | |
| 6503 | Lanthanum complex, CCDC: QAPXAG (Geo) | C48H36N6O14La2 | |
| 6504 | Lanthanum complex, CCDC: TEQBIA (Geo) | C18H14O16La2 | |
| 6505 | Lanthanum complex, CCDC: YIVZIM (Geo) | C12H44N4O16La2 | |
| 6506 | Lanthanum complex, CCDC: ALANIC (Geo) | C36H32N6O16La2 | |
| 6507 | Lanthanum complex, CCDC: CUMCES (Geo) | C16H28O18La2 | |
| 6508 | Lanthanum complex, CCDC: HETALA11 (Geo) | C20H38N4O18La2 | |
| 6509 | Lanthanum complex, CCDC: ZEQVUM (Geo) | C42H40N6O20La2 | |
| 6510 | Lanthanum complex, CCDC: SUZXIU (Geo) | C74H70N4O24La2 | |
| 6511 | bis((mu-2-Fluorido)-(h5-1,3-bis(trimethylsilyl)-cyclopentadienyl)-lanthanum(iii) (Geo) | C44H84F2Si8La2 | |
| 6512 | Dilanthanum heptachloride, anion | Cl7La2 | |
| 6513 | Dilanthanum heptachloride (Geo) | Cl7La2 | |
| 6514 | Lanthanum complex, CCDC: ZEWYOP (Geo) | C32H20N4O14Cl18La2 | |
| 6515 | Cerium complex, CCDC: XONYAA (Geo) | C45H33N9Ce | |
| 6516 | Cerium complex, CCDC: GIFCUT (Geo) | C23H27B2N12O2Ce | |