...+ )Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 5 (H 2 O) 4 , is a new astrophyllite-group mineral discovered in a syenite pegmatite at Buer on the Vesterøya peninsula, Sandefjord, Oslo Region, Norway. The mineral occurs in pegmatite cavities as 0.01–0.05 mm thick lamellar (0.2–0.5 × 5–10 mm) crystals forming rosette...

... reported from several localities on the peninsula Vesterøya, of which Vøra, where aenigmatite masses up to 20 cm across are found in syenite pegmatites cutting larvikite, is the most famous ( Hansen & Berge, 1976 ; Raade & Larsen, 1980 ; Hansen, 1981 ; Engvoldsen et al. , 1991 ; Andersen et...

...., 46, 1033–1042. Fluorine-rich hibschite was found in a calcite-amphibole-diopside silicocarbonatite from the Afrikanda Complex, Kola Peninsula, Russia. The hibschite is found as colorless, isotropic grains 10 to 50 μm in diameter with a consistent backscatter and optical zoning resulting from...

..., at the Vesterøya peninsula, Sandefjord, Oslo Region, Norway. Previously the mineral was mentioned at the same location as a murmanite-like hydrous Ca-Fe-Ti-silicate under the name UK-8 ( Engvoldsen et al. 1991 ; Andersen et al. 1996 ). Sveinbergeite was found in cavities in microcline where associated...

... by a prismatic, fibrous clinopyroxene. Late-stage amphibole and clinopyroxene also occur within vugs at Jahren. Similar relationships are observed at Kariasen on the Vesterøya peninsula (LACP19), suggesting localized late post-magmatic alteration by fluids in some of the miaskitic pegmatites. However...

... relating the two minerals. Substitutions 3 and 4 can explain why analyses from other areas as well as Ilímaussaq give more Fe 3+ than predicted by substitution 1 (e.g. Vesterøya, Norway, Grew et al ., 2008 ) and why Al > Ca. Substitution 2 links end-member aenigmatite with our suggested end-member...

... the Franciscan of the Laytonville district, Mendocino County, California . American Mineralogist , 50 , 278 . Akasaka M. , Kimura T. and Nagashima M. ( 2013 ) X-ray Rietveld and 57 Fe Mössbauer study of babingtonite from Kouragahana, Shimane Peninsula, Japan . Journal of Mineralogical...