| Name: | Preiswerkite Pwk |
| IMA Chemistry: | NaAlMg2(Si2Al2)O10(OH)2 |
| Chemistry Elements: | The mineral Preiswerkite contains elements: Sodium (Na) Aluminum (Al) Magnesium (Mg) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | Switzerland |
| Year First Published: | 1979 |
| IMA Status: | Approved |
| Status Notes: | Keusen H R, Peters T (1980) Preiswerkite, an Al-rich trioctahedral sodium mica from the Geisspfad ultramafic complex (Penninic Alps), American Mineralogist 65, 1134-1137 |
| Structural Group Name: | Mica |
| Fleischer's Group Name: | mica-true micas |
| Crystal Systems: | monoclinic |
| Oldest Known Age: | 982 Million Years Ago |
| More Info: | Search Wikipedia: Preiswerkite (Wiki) Search Mindat: Preiswerkite Search Web Mineral DB: Preiswerkite |