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Synchysite-(Ce)

Year of discovery: 1901 (Narsaarsuk pegmatite, Greenland), 1982 (Japan)

Locality list: 4 localities of synchysite-(Ce)

• CaCe(CO₃)₂F
• Ca(Ce,La)(CO₃)₂F
• [Ca²⁺][Ce³⁺][F|(CO₃)₂]^5-

• Class: Bastnäsite (Bastnasite) group
• Class: Carbonate - Fluoride
• Radioactive: Weak

• Ca => Ba: Huanghoite-(Ce), Qaqarssukite-(Ce)

• Ce => Y: Synchysite-(Y)
• Ce => Nd: Synchysite-(Nd)

• Color: Gray, Grayish yellow, Yellowish brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent-Opaque

• Cleavage: Indistinct on {0001} (1 plane)
• Hardness: 4.5
• Density: 3.9

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=12.3, b=7.1, c=18.7, β=102.7