Nordite

nordite

nordite-(Ce)

nordite-(La)

pegmatites

Formulae:
nordite-(Ce): Na₃SrCeZnSi₆O₁₇
nordite-(La): Na₃SrLaZnSi₆O₁₇
Phyllosilicates (sheet silicates), nordite group
Crystal System: Orthorhombic
Streak: Light brown
Colour: Light brown, dark brown to black
weakly RADIOACTIVE
Environments:

Pegmatites

Nordite is extremely rare in sodalite syenite pegmatites (Webmin, HOM).

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