Solid phase
- Official name
- Neodymium(III) phosphate
- Secondary names
- Neodymium phosphate; Neodymium orthophosphate; Neodymium(3+);phosphate; Phosphoric acid, neodymium(3+) salt (1:1); Monazite-(Nd); monoclinic-NdPO4; NdPO4-mon; NdPO4-rt
- CAS number
- 14298-32-9
- Family
- ionic solid
- Class
- normal salt
- Compound type
- phosphate
- Formula
- $Nd^{3+} \cdot PO_4^{3-}$
- Chemical formula
- NdPO4
- Elemental formula
- (Nd3+) P O (O-)3
- Isotope mixture type
- terrestrial abundance
- Class
- normal salts (07)
- Type
- simple normal salts (07.01)
- Phase name
- monoclinic-NdPO4
- Phase type
- crystalline
- Crystal system
- monoclinic
- Crystal class
- prismatic
- Crystal class symbol
- 2/m (C2h)
- Crystal spacegroup
- P2(1)/c
- Molar mass
- 239.21 $g/mol$
- Density
- 5.26 $g/cm^3$
- State NTP
- solid
- Phase transitions
-
Phase transition type Other phases Temperature - Pressure solid-solid hexagonal-NdPO4 above ?? K
- Refringence type
- biaxial
- Refringence sign
- positive
- Birefringence
- 0.050 - 0.060
- Refraction index $n_{\alpha}$
- 1.770 - 1.800
- Refraction index $n_{\beta}$
- 1.771 - 1.802
- Refraction index $n_{\gamma}$
- 1.830 - 1.850