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Monazite-(Nd)

Year of discovery: 1986 (Monte Giove, Italy), 1986 (Japan)

Locality list: A locality of monazite-(Nd)

• NdPO₄
• (Nd,La,Ce)(P,Si)O₄
• [Nd³⁺][PO₄]^3-

• Class: Monazite group
• Class: Phosphate
• Soluble in: HCl (Decompose)
• Radioactive: Weak

• Nd => Fe: Rodolicoite
• Nd => Al: Berlinite
• Nd => Y: Xenotime-(Y)
• Nd => Sc: Pretulite
• Nd => Yb: Xenotime-(Yb)
• Nd => Ce: Monazite-(Ce)
• Nd => La: Monazite-(La)
• Nd => Sm: Monazite-(Sm)

• PO₄ => VO₄: Wakefieldite-(Nd)
• PO₄ => NbO₄: Fergusonite-(Nd), β-Fergusonite-(Nd)

• Color: Brown, Red, Yellow
• Streak: Gray
• Luster: Adamantine
• Diaphaneity: Translucent

• Habit: Thick tabular

• Cleavage: Distinct on {001} (1 plane), Indistinct on {100} (1 plane)
• Hardness: 5-5.5
• Density: 5.2

• System: Monoclinic
• Group: 2/m, P2₁/n
• Lattice: a=6.8, b=7.0, c=6.5, β=103.6

Etymology: Monazein (Lonliness) in Greek