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ATHENA

MINERALOGY

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Mineral: NEPTUNITE
Formula: KNa2Li(Fe2+,Mn)2Ti2Si8O24
Crystal System: Monoclinic
Group: Neptunite group
IMA Number: 1893
References: AM 57 (1972), 85; L 5 (1982), 6; HB2/2 (1995); ZRMO 145/2 (2016), 112
Type Locality: Narsarsuk, Julianehaab distr., Greenland
Neptunite (6.1cm) on natrolite
Benitoite Gem Mine, San Benito Co., CA, USA
Coll. and Photo © John Veevaert, Trinity Minerals
See also: athena.unige.ch -> mineral pictures

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