| Adamsite-(Y) | |
| Formula: | NaY(CO3)2·6H2O |
| Imasymbol: | Ads-Y[1] |
| Strunz: | 5.CC.30 |
| System: | Triclinic |
| Class: | Pinacoidal (same H-M symbol) |
| Symmetry: | P |
| Mohs: | 3.0 |
Adamsite-(Y) (previously IMA 1999-020), chemical formula NaY(CO3)2·6H2O is a mineral of sodium, yttrium, carbon, oxygen, and hydrogen. It is named after Frank Dawson Adams (1859–1942), professor of geology, McGill University. Its Mohs scale rating is 3.