678983-34-1

Basic information

• Product Name: ALUMINUM POTASSIUM FLUORIDE
• Synonyms: ALUMINUM POTASSIUM FLUORIDE;POTASSIUM ALUMINUM FLUORIDE;POTASSIUM TETRAFLUOROALUMINATE;Aluminate(1-), tetrafluoro-, potassium (1:1), (T-4)-;Einecs 238-485-8
• CAS NO: 678983-34-1
• Molecular Formula: AlF4K
• Molecular Weight: 142.07
• EINECS: 238-485-8
• Product Categories: Inorganic Chemicals
• Mol File: 678983-34-1.mol
• Article Data: 5

Chemical Properties

• Appearance: /
• CAS DataBase Reference: ALUMINUM POTASSIUM FLUORIDE(CAS DataBase Reference)
• NIST Chemistry Reference: ALUMINUM POTASSIUM FLUORIDE(678983-34-1)
• EPA Substance Registry System: ALUMINUM POTASSIUM FLUORIDE(678983-34-1)

Safety Data

• Hazard Codes: Xi
• Statements: 31-36/37/38
• Safety Statements: 26-36/37/39
• WGK Germany: 3
• Hazardous Substances Data: 678983-34-1(Hazardous Substances Data)

Usage

InChI:InChI=1/Al.FH.K/h;1H;/q+3;;+1/p-1

Upstream product

• 7664-39-3 hydrogen fluoride 
• 584-08-7 potassium carbonate 
• 1333-84-2 aluminum oxide 
• 14075-53-7 potassium tetrafluoroborate 
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• 7429-90-5 aluminium 
• 7789-23-3 potassium fluoride 
• 7783-61-1 silicon tetrafluoride 

Relevant articles and documents

(Oxo)(Fluoro)-Aluminates in KF-Al2O3 System: Thermal Stability and Structural Correlation

Precise investigation of part of the phase diagram of KF-Al2O3 system was performed in an experiment combining different techniques. Solidified mixtures of KF-Al2O3 were studied by X-ray powder diffraction and high-field solid-state NMR spectroscopy over a wide range of compositions. To help with the interpretation of the NMR spectra of the solidified samples found as complex admixtures, we synthesized the following pure compounds: KAlO2, K2Al22O34, α-K3AlF6, KAlF4, and K2Al2O3F2. These compounds were then characterized using various solid-state NMR techniques, including MQ-MAS and D-HMQC. NMR parameters of the pure compounds were finally determined using first-principles density functional theory calculations. The phase diagram of KF-Al2O3 with the alumina content up to 30 mol % was determined by means of thermal analysis. Thermal analysis was also used for the description of the thermal stability of one synthesized compound, K2Al2O3F2.

Investigation of the systems KAlF4-KBe2F5 and K3AlF6-KBe2F5

Phase relations in the systems KA1F4-KBe2F5 and K3A1F6-KBe2F5 have been investigated by DTA and XRD methods. The KA1F4-KBe2F5 is a simple eutectic system with the eutectic point at a composition of 80.0 mol% KBe2F5 at 335 °C. For the later system, two incongruent compounds 2K3A1F6·KBe2F5 and K3A1F6·KBe2F5 melting at 448 and 378 °C, respectively were confirmed. They have been XRD indexed as both orthorhombic cells with cell parameters a = 10.70±0.01, b = 10.36±0.01, c = 5.85±0.02 A? for the former and a = 10.499±0.003, b = 9.685±0.005, c = 7.554±0.005 A? for the later. One eutectic point located at 85.0 mol% KBe2F5 at 336 °C was also observed. (C) 2000 Elsevier Science B.V.

A calorimetric investigation of polymorphism in a layered perovskite: KAlF4

The heat capacity from 15 to 365 K of the layered perovskite KAlF4 is reported.On warming, a large thermal anomaly is observed at about 340 K, and the thermal history of the sample was found to have a major effect on the temperature, enthalpy, and complexity of the phase transition.D.s.c. results indicate that the phase transition on warming at 340 K is the high-temperature counterpart of the transition that had been previously reported at 250 K on cooling, and that the 250 K transformation is the stable transition.No further phase transitions are found in KAlF4 in the temperature region from 15 to 365 K.