Aluminium Fluoride Evaporation Materials - AlF3 Granule

Purity---
99.99％

Shape---
Granules, Irregular pieces, Solid substance, Custom-Made

Dimension---
1-3mm, 4-10mm, Custom-Made

Property---
Evaporation temperature---Vapour pressure at 817 ℃ 1 Pa, at 882 ℃ 10 Pa
Solubility---Insoluble in water
Properties of thin film---
Transmission range 200 ～20000nm
Refractive index at 500nm ～1.35
Hints on evaporation---
Evaporation with electron beam gun (Mo, Ta)
Evaporation temperature ～900～1100℃
Substrate temperature ～ 300 ℃
Application--- UV coating

Application---

Aluminium fluoride (AlF₃) is an inorganic compound used primarily in the production of aluminium. This colorless solid can be prepared synthetically but also occurs in nature. It is used in the production of aluminium metal.

Structure Its structure adopts the rhenium trioxide motif, featuring distorted AlF6 octahedra. Each fluoride is connected to two Al centers. Because of its 3-dimensional polymeric structure, AlF3 has a high melting point. The other trihalides of aluminium in the solid state differ, AlCl3 has a layer structure and AlBr3 and AlI3, are molecular dimers. Also they have low melting points and evaporate readily to give dimers.In the gas phase aluminium fluoride exists as trigonal molecules of D3h symmetry. The Al-F bond lengths of this gaseous molecule are 163 pm.

Application: Aluminium fluoride is an important additive for the production of aluminium by electrolysis. Together with cryolite, it lowers the melting point to below 1000 °C and increases the conductivity of the solution. It is into this molten salt that aluminium oxide is dissolved and then electrolyzed to give bulk Al metal.

Basic Infomation

CAS Number: 7784-18-1

32287-65-3 (monohydrate)

15098-87-0 (trihydrate)

CHEBI:49464

ChemSpider:2039

PubChem:2124

RTECS number:BD0725000

Molar mass:83.9767 g/mol (anhydrous)

101.022 g/mol (monohydrate)

138.023 (trihydrate)

Density: 3.1 g/cm3 (anhydrous),

2.1 g/cm3 (monohydrate),

1.914 g/cm3 (trihydrate)

Appearance: white, crystalline solid odorless

Space group:R-3c, No. 167

Molar mass:

83.9767 g/mol (anhydrous)

101.022 g/mol (monohydrate)

138.023 (trihydrate)

Melting point:

1,291 °C (2,356 °F;1,564 K)(anhydrous) (sublimes)

Solubility in water:

0.56 g/100 mL (0 °C)

0.67 g/100 mL (20 °C)

1.72 g/100 mL (100 °C)

Crystal structure: Rhombohedral, hR24

Solubility in water:

0.56 g/100 mL (0 °C),

0.67 g/100 mL (20 °C)

1.72 g/100 mL (100 °C)