Ferronordite-(La)
Ferronordite-(La) is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₃SrLaFe²⁺Si₆O₁₇.
It crystallizes in the orthorhombic crystal system (space group Pcca). It is a member of the Nordite structural group.
Key properties: Mohs hardness 5; specific gravity 3.54; White streak; Vitreous to greasy luster; optically biaxial.
IMA symbol Fnor-La, IMA status: approved, named in 2000.
Found in the ussingite core of hyperagpaitic pegmatite.
It is found associated with Aegirine, epistolite, steenstrupine-(Ce), serandite, sphalerite.
A member of the nordite group with a prefix, ferro, that indicates dominant Fe2+ in the tetrahedral structural site and a suffix for the dominant rare earth element.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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