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Ferriallanite-(Ce)

Year of discovery: 2000 (Neprimetnyi pegmatite, Mongolia), 2009 (Japan)

Locality list: 4 localities of ferriallanite-(Ce)

• CaCeAlFe₂Si₃O₁₂(OH)
• Ca(Ce,La)AlFe₂Si₃O₁₂(OH)
• [Ca²⁺Ce³⁺][Fe³⁺Al³⁺Fe²⁺][OH|O|SiO₄|Si₂O₇]^13-

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

• Ce => La: Ferriallanite-(La)

• Fe³⁺ => Al: Allanite-(Ce)

• Color: Black
• Streak: Brown
• Luster: Resinous
• Diaphaneity: Translucent-Opaque

• Cleavage: No
• Hardness: 6
• Density: 4.2

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=9.0, b=5.8, c=10.2, β=115.0