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Vanadoallanite-(La)

Year of discovery: 2010 (Japan as the first occurence in the World)

Locality list: 2 localities of vanadoallanite-(La)

• CaLaVAlFeSi₃O₁₂(OH)
• Ca(La,Ce,Nd)VAlFeSi₃O₁₂(OH)
• [Ca²⁺La³⁺][V³⁺Al³⁺Fe²⁺][OH|O|SiO₄|Si₂O₇]^13-

• Class: Allanite group < Epidote supergroup
• Class: Sorosilicate - Nesosilicate - Oxide - Hydroxide

• V => Al: Allanite-(La)
• V => Fe: Ferriallanite-(La)

• Color: Black, Brown
• Streak: Brown
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Imperfect on {001} (1 plane), Poor on {100} and {110} (3 planes)

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=8.9, b=5.8, c=10.1, β=114.1