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Hiortdahlite I from
Langodden, Arøyskjærene (Arøy skerries), Langesundsfjorden, Larvik, Vestfold, Norway

Classification
Species:'Hiortdahlite I' (not an IMA approved species)
Formula:Na4Ca8Zr2(Nb,Mn,Ti,Fe,Mg,Al)2(Si2O7)4O3F5
Habit:euhedral, plate-shaped crystals
Colour:Pale yellow
Confirmation
Validity:Valid - Type Locality
References
References:Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineral. 16. 663 pp (p 367-377; Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp; Andersen, T., Erambert, M., Larsen, A. O. and Selbekk, R. S. (2010): Petrology of nepheline syenite pegmatites in the Oslo Rift, Norway: Zirconium silicate mineral assemblages as indicators of alkalinity and volatile fugacity in mildly agpaitic magma. J. Petrology 51, 2303-2325.
Data
Mineral Data:Click here to view Hiortdahlite I data
Locality Data:Click here to view Langodden, Arøyskjærene (Arøy skerries), Langesundsfjorden, Larvik, Vestfold, Norway
 
Mineral and/or Locality  
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