Gaidonnayite
Na2ZrSi3O9 • 2H2O [CNMNC approved formula]
Named for Gabrielle Hamburger Donnay (1920-1987), crystallographer and mineralogist, McGill University.
| IMA status : | Approved Species 1974 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
59.02.02.03 |
| (59) Cyclosilicate Three-Membered Rings | |
| (59.02) hydrated | |
| (59.02.02) Catapleiite group | |
| Nickel-Strunz (10th edition) : |
09.DM.15 |
| (09) Silicates | |
| (09.D) Inosilicates* Structural terminology per Liebau (1985) | |
| (09.DM) with 6-periodic single chains | |
| Crystal system: | Orthorhombic System |
| Point group (H-M): | mm2 — pyramidal |