Lanthanum(III) phosphate | SSHADE

Solid phase

Official name: Lanthanum(III) phosphate

Name and identifiers

Secondary names: Lanthanum phosphate; Lanthanum orthophosphate; lanthanum(3+);phosphate; Phosphoric acid, lanthanum(3+) salt (1:1); Monazite-(La); monoclinic-LaPO4; LaPO4-mon; LaPO4-rt
CAS number: 13778-59-1

Family: ionic solid
Class: normal salt
Compound type: phosphate

Chemical composition

Formula: $La^{3+} \cdot PO_4^{3-}$
Chemical formula: LaPO4
Elemental formula: (La3+) P O (O-)3
Isotope mixture type: terrestrial abundance

4.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$La^{3+}$	Lanthanum 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 and bonds

Chemical functions

	Function	Number
	$(PO_4)^{3-}$	1

Chemical bonds

	Bond	Number
	$\cdot (\cdot) La^{3+} \cdot O^{-}-$	3
	$\dddot - \dddot - \dddot - P \dddot - O^{-3/4}$	4

Class: normal salts (07)
Type: simple normal salts (07.01)

Crystallography

Phase name: monoclinic-LaPO4
Phase type: crystalline
Crystal system: monoclinic
Crystal class: prismatic
Crystal class symbol: 2/m (C2h)
Crystal spacegroup: P2(1)/c

Physical properties

Molar mass: 233.877 $g/mol$
Density: 4.93 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-solid	hexagonal-LaPO4	above ?? K

Optical properties

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

Links and Publications

Links