Sanidine [ (K,Na)(Si,Al)4O8 ]
Material properties
| Formula | (K,Na)(Si,Al)4O8 |
| Abbreviation | Sa |
| IMA Status | Grandfathered (pre-IMA), 1808 |
| Crystal symmetry | Monoclinic |
| Classification | Alkali feldspar |
| Variant | high |
| Luminescence emitters | Fe, Mn, Pb, Unspecified |
| Search other databases | webmineral.com, mindat.org, rruf.info, fluomin.org, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database |
| Tags | Aluminosilicate, Mineral |
Composition
| Element | Atoms |
|---|---|
| O | 8 |
| Al | 1 |
| Si | 3 |
| K | 0.75 |
| Na | 0.25 |
| Total: | 13 |
Specimens of Sanidine
| Name | Owner | Materials | Phase purity | Image |
|---|---|---|---|---|
| M2362 Sanidine | CSIRO | Albite (var. Ca), Albite, Ferro-ferri-hornblende, Microcline, Muscovite-1M (var. Mg), Sanidine (var. high) (20.0%) | 20.0 | |
| M0834 Ankerite | CSIRO | Albite (var. Ca), Ankerite, Augite, Forsterite (var. Fe), Ilmenite, Montmorillonite, Sanidine (13.9%) | 13.9 |
