Lanthanum trifluoride | SSHADE

Solid phase

Official name: Lanthanum trifluoride

Name and identifiers

Secondary names: Lanthanum(III) fluoride
CAS number: 13709-38-1

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

Chemical composition

Formula: $LaF_3$
Chemical formula: LaF3
Elemental formula: (La3+) (F-)3
Isotope mixture type: terrestrial abundance

8.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$La^{3+}$	Lanthanum cation	element	1	0.25	1	constituent cation	main
	$F^-$	Fluoride anion	element	3	0.75	1	constituent anion	main

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$\cdot (\cdot) La^{3+} \cdot F^{-}$	3

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

Associated phases

Equivalent mineral: Fluocerite-(La)

Crystallography

Phase type: crystalline
Crystal system: trigonal
Crystal class: ditrigonal-scalenohedral
Crystal class symbol: -3m (D3d)
Crystal spacegroup: P-3c1

Physical properties

Molar mass: 195.9 $g/mol$
Density: 5.9 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid	liquid $LaF_3$	1493°C (1766 K)

Optical properties

Refringence type: uniaxial
Refringence sign: negative
Birefringence: 0.006
Refraction index $n_{\alpha}$: 1.609
Refraction index $n_{\beta}$: 1.603
Pure color: white
Color: white
Diaphaneity: transparent to translucent
Luster: vitreous

Links and Publications

Links