Solid phase
Official name
Gadolinium(III) phosphate
Secondary names
Monazite-(Gd); GdPO4
CAS number
13628-51-8
Type
Family
ionic solid
Class
normal salt
Compound type
phosphate
Comments
the other polymorphe is a tetragonal phase (Xenotime-(Gd))
Chemical composition
Formula
$GdPO_4$
Chemical formula
GdPO4
Elemental formula
(Gd3+) P O (O-)3
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Gd^{3+}$ Gadolinium cation element 1 0.5 1 constituent cation main
$(PO_4)^{3-}$ Phosphate anion chemical function 1 0.5 1 anionic radical main
Chemical functions
  Function Number
$(PO_4)^{3-}$ 1
Chemical bonds
  Bond Number
$\cdot (\cdot) Gd^{3+} \cdot O^{-}-$ 3
$\dddot - \dddot - \dddot - P \dddot - O^{-3/4}$ 4
Class
normal salts (07)
Type
simple normal salts (07.01)
Equivalent mineral
Monazite-(Gd)
Phase name
monoclinic-$GdPO_4$
Phase type
crystalline
Crystal system
monoclinic
Crystal class
prismatic
Crystal class symbol
2/m (C2h)
Crystal spacegroup
P2(1)/c
Molar mass
252.22 $g/mol$
Density
5.55 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
positive
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