| # | Species | Formula |
| 4588 | Y(III)O8 (COQDUH) (Geo) | C15H7O8F18Y | |
| 4589 | Y(III)O8 (COQDUH) | C15H7O8F18Y | |
| 4590 | Y(III)O8 (ERUYAR) (Geo) | C19H13O8F18Y | |
| 4591 | Y(III)O8 (ERUYAR) | C19H13O8F18Y | |
| 4592 | Y(III)O8(-) (CYSFAC10) (Geo) | C20H4O8F24Y | |
| 4593 | Y(III)O8(-) (CYSFAC10) | C20H4O8F24Y | |
| 4594 | Yttrium(II) sulfide (Geo) | SY | |
| 4595 | Yttrium(II) sulfide | SY | |
| 4596 | YO6N3 (BUTKEG) (Geo) | C23H24N3O6S3Y | |
| 4597 | YO6N3 (BUTKEG) | C23H24N3O6S3Y | |
| 4598 | Y(III)O9 (CEXFAM) (Geo) | C6H18N3O12S3Y | |
| 4599 | Y(III)O9 (CEXFAM) | C6H18N3O12S3Y | |
| 4600 | Y(III)N6(3-) (KAKQES) (Geo) | C6N6S6Y | |
| 4601 | Y(III)N6(3-) (KAKQES) | C6N6S6Y | |
| 4602 | Yttrium(I) monochloride (Geo) | ClY | |
| 4603 | Yttrium(I) chloride | ClY | |
| 4604 | Yttrium(III) oxide chloride (Geo) | OClY | |
| 4605 | Yttrium(III) oxide chloride | OClY | |
| 4606 | Y(Cp)2O2Cl (AGUVUT) (Geo) | C28H30O2ClY | |
| 4607 | Y(Cp)2O2Cl (AGUVUT) | C28H30O2ClY | |
| 4608 | Y(III)O7Cl(2+) (FIZKOO) (Geo) | C12H28O8ClY | |