ATHENA MINERAL: Mineral Data; Pierre Perroud

ATHENA

MINERALOGY

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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