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Perrierite-(Ce)

Year of discovery: 1950 (Nettuno, Italy), 1953 (Japan)

Locality list: A locality of perrierite-(Ce)

• Ce₄MgFe₂Ti₂Si₄O₂₂
• (Ce,La,Ca,Th)₄(Mg,Fe)Fe₂Ti₂Si₄O₂₂
• [Ce³⁺₄][Mg²⁺][Fe³⁺₂][Ti⁴⁺₂][O₈|(Si₂O₇)₂]^28-

• Class: Chevkinite group
• Class: Sorosilicate - Oxide
• Soluble in: HCl (Decompose)
• Radioactive: Weak

• Polymorph: Dingdaohengite-(Ce) (Monoclinic), Chevkinite-(Ce) (Monoclinic)

• Ce => La: Perrierite-(La)

• Color: Brown, Dark reddish brown
• Streak: Brown
• Luster: Vitreous
• Diaphaneity: Translucent-Opaque

• Hardness: 5.5
• Density: 4.4

• System: Monoclinic
• Group: 2/m, C21/a
• Lattice: a=13.6, b=5.6, c=11.7, β=113.5