| Name: | Astrophyllite Ast |
| Specimens in Collection: |  #524: Astrophyllite Eveslogchorr Mtn. Murmansk Oblast, Russia |
| IMA Chemistry: | K2NaFe2+7Ti2(Si4O12)2O2(OH)4F |
| Chemistry Elements: | The mineral Astrophyllite contains elements: Potassium (K) Sodium (Na) Iron (Fe) Titanium (Ti) Silicon (Si) Oxygen (O) Hydrogen (H) Fluorine (F) |
| Country of Type Locality: | Norway |
| Year First Published: | 1848 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Weibye P C (1848) Beiträge zur topographischen Mineralogie Norwegens, Archiv für Mineralogie, Geognosie, Bergbau und Hüttenkunde. 22, 465-544 Chemical composition determined: Brøgger W C (1890) Die mineralien der syenitpegmatitgänge der sünorwegischen augit- und nephelinsyenite, 35. Astrophyllit, Zeitschrift für Kristallographie 16, 200-216 Chemical composition revised according to: Cámara F, Sokolova E, Abdu Y, Hawthorne F C (2010) The crystal structures of niobophyllite, kupletskite-(Cs) and Sn-rich astrophyllite: Revisions to the crystal chemistry of the astrophyllite-group minerals, The Canadian Mineralogist 48, 1-16 |
| Structural Group Name: | Astrophyllite-Astrophyllite |
| Fleischer's Group Name: | astrophyllite |
| Crystal Systems: | triclinic|monoclinic |
| Oldest Known Age: | 2500 Million Years Ago |
| Mohs Hardness: | 3.5 |
| Diaphaneity: | 1.0 |
| Specific Gravity: | 3.3 |
| More Info: | Search Wikipedia: Astrophyllite (Wiki) Search Mindat: Astrophyllite Search Web Mineral DB: Astrophyllite |