| # | Species | Formula |
| 6900 | Gadolinium complex, CCDC: YAVSUJ (Geo) | C10H14N8O22Gd2 | |
| 6901 | Gadolinium complex, CCDC: COSTAF (Geo) | C64H56N6O26Gd2 | |
| 6902 | Gadolinium complex, CCDC: SERYOD (Geo) | C12H12O18F18Gd2 | |
| 6903 | Terbium complex, CCDC: XEXJIT (Geo) | C27H27N4O3Tb | |
| 6904 | Terbium complex, CCDC: QAWHIF (Geo) | C24H24B2N13O3Tb | |
| 6905 | Terbium complex, CCDC: NAXRAF (Geo) | C32H28B2N13O3Tb | |
| 6906 | Terbium complex, CCDC: MIWTAN (Geo) | C26H32N6O4Tb | |
| 6907 | Terbium complex, CCDC: DIFHEF (Geo) | H41BC54N9O4Tb | |
| 6908 | Terbium complex, CCDC: XAXXUP (Geo) | C40H67N2O6Tb | |
| 6909 | Terbium complex, CCDC: NASTUW (Geo) | C26H28N8O6Tb | |
| 6910 | Terbium complex, CCDC: LIFJEP (Geo) | C38H26N12O6Tb | |
| 6911 | Terbium complex, CCDC: VAPTEL (Geo) | C66H72N12O6Tb | |
| 6912 | Terbium complex, CCDC: VAPTEL01 (Geo) | C66H72N12O6Tb | |
| 6913 | Terbium complex, CCDC: XARXET (Geo) | C15H16N3O8Tb | |
| 6914 | Terbium complex, CCDC: CULSEH (Geo) | C18H28N4O8Tb | |
| 6915 | Terbium complex, CCDC: XAWTUK (Geo) | C15H15N5O8Tb | |
| 6916 | Terbium complex, CCDC: BAFZOY (Geo) | C20H18N5O8Tb | |
| 6917 | Terbium complex, CCDC: DUCQEX (Geo) | C13H14N8O8Tb | |
| 6918 | Terbium complex, CCDC: BUVXEV01 (Geo) | H18O9Tb | |
| 6919 | Terbium complex, CCDC: ZZZARD01 (Geo) | H18O9Tb | |
| 6920 | Terbium complex, CCDC: KUYBEL (Geo) | C6H22O9Tb | |