Item talk:Q162233
Mindat Short Description
Astrophyllite Group. The mineral was first found in 1844 by the Norwegian mineralogist Paul Christian Weibye (1819-1865) and later described by him, in 1848, as a brown, micaceous mineral ("brauner Glimmer") from Låven (formerly Lamöskjär), Langesund...
Geoscience Ontology 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
IMA Formula (from Mindat)
K2NaFe2+7Ti2(Si4O12)2O2(OH)4F
RRUFF Formula (from Geoscience Ontology)
K2NaFe2+7Ti4+2(Si4O12)2O2(OH)4F
