Vanadoallanite-(La)
Vanadoallanite-(La) is an IMA-recognized mineral species in the silicate class, with the chemical formula CaLa³⁺V³⁺AlFe²⁺(Si₂O₇)(SiO₄)O(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Epidote structural group.
Key properties: specific gravity 4.15; Vitreous luster.
IMA symbol Valn-La, IMA status: approved, named in 2012.
Found in a vein cutting a stratiform ferromanganese deposit.
It is found associated with Rhodochrosite, tephroite, magnetite, hematite, caryopilite, monazite-(La), chalcopyrite, pentlandite, heazlewoodite, bementite, iseite.
The name refers to a member of the allanite group with dominant vanadium in the M1 site and suffix for the dominant rare earth element, lanthanum.
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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