Caesium aluminium fluoride

Caesium tetrafluoroaluminate IUPAC name caesium fluoride—aluminium trifluoride (1/1) Other names Caesium aluminium fluoride Identifiers InChI InChI=1/Al.Cs.4FH/h;;4*1H/q+3;+1;;;;/p-4 InChIKey UYFXWCIZFDKSTJ-XBHQNQODAD Standard InChI InChI=1S/Al.Cs.4FH/h;;4*1H/q+3;+1;;;;/p-4 Standard InChIKey UYFXWCIZFDKSTJ-UHFFFAOYSA-J CAS number [138577-01​-2] ChemSpider 16409562 Properties Chemical formula CsAlF4 Molar mass 235.88 g/mol Melting point 420–450 ºC Solubility in water approx. 1.2 g/100 ml (20 ºC) Hazards EU index number not listed Flash point non-flammable Related compounds Other anions Caesium hexafluorosilicate Other cations Lithium tetrafluoroaluminate Sodium tetrafluoroaluminate Potassium tetrafluoroaluminate Rubidium tetrafluoroaluminate Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Tricaesium nonafluorodialuminate IUPAC name Caesium fluoride—aluminium trifluoride (3/2) Other names Caesium fluoroaluminate (60:40) Identifiers InChI InChI=1/2Al.3Cs.9FH/h;;;;;9*1H/q2*+3;3*+1;;;;;;;;;/p-9 CAS number [138577-01​-2] Properties Chemical formula Cs3Al2F9 Molar mass 624 g/mol Melting point 420–480 ºC Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium tetrafluoroaluminate, also known as caesium aluminium fluoride, is a mixed fluoride of caesium and aluminium: the formula CsAlF₄ corresponds to a 1:1 combination of caesium fluoride and aluminium fluoride. Other combinations are known, such as the 3:2 formulation Cs₃Al₂F₉. These compounds are used as brazing fluxes, especially for aluminium–magnesium alloys.

External links

• Cesium Tetrafluoro Aluminate Complex 50:50 from Chemetall GmbH
• Cesium Tetrafluoro Aluminate Complex 60:40 from Chemetall GmbH