| # | Species | Formula |
| 4580 | Y(III)O9 (AFARII) (Geo) | C18H15N6O18Y | |
| 4581 | Y(III)O9 (AFARII) | C18H15N6O18Y | |
| 4582 | Yttrium(I) fluoride | FY | |
| 4583 | Yttrium(III) oxide fluoride | OFY | |
| 4584 | Yttrium(III) trifluoride | F3Y | |
| 4585 | Yttrium(III) tetrafluoride, anion | F4Y | |
| 4586 | Yttrium(III) hexafluoride | F6Y | |
| 4587 | Y(III)O6 (HEDJOP) (Geo) | C18H23O6F18Y | |
| 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 | |