Phyllosilicate (sheet silicate)
Specific gravity: 2.615 to 2.622
Hardness: 2 to 3
Colour: Grey to silver-white, colourless in transmitted light
Common impurities: Ti,Mg,Ca,K,H2O,P
Plutonic igneous environments
At the type locality, Naujakasik, Tunulliarfik Fjord, Ilímaussaq complex, Kujalleq, Greenland, naujakasite occurs in an alkalic intrusion, intimately associated with arfvedsonite (AM 20.138). Other associated minerals include steenstrupine-(Ce), sodalite and analcime (Mindat, HOM).
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