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Ammonium hexafluoroaluminate

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Identification
Molecular formula
(NH4)3AlF6
CAS number
7784-19-2
IUPAC name
triammonium;hexafluoroaluminum(3-)
State
State

At room temperature, ammonium hexafluoroaluminate is in a solid state. It typically exists as fine, white crystals and is known for its stability under standard conditions.

Melting point (Celsius)
151.00
Melting point (Kelvin)
424.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
195.05g/mol
Molar mass
195.0460g/mol
Density
2.3000g/cm3
Appearence

Ammonium hexafluoroaluminate, also known as triammonium hexafluoroaluminate, appears as a white crystalline solid. The compound is characterized by its crystalline nature, often forming small, moisture-sensitive crystals that are soluble in water.

Comment on solubility

Solubility of Triammonium Hexafluoroaluminate (3-)

Triammonium hexafluoroaluminate (3-), with its complex ionic structure, displays intriguing solubility characteristics that are important in various chemical applications. When considering its solubility, several key points come into play:

  • Solvent Interaction: This compound is highly soluble in polar solvents, particularly water, due to the presence of ammonium ions that can interact favorably with water molecules.
  • Ionic Nature: Being an ionic compound, its solubility is influenced by the strength of ionic bonds and the entropy change during dissolution.
  • Temperature Dependence: The solubility typically increases with temperature, which is common for many ionic compounds. This is indicative of the endothermic nature of the dissolution process.
  • Conductivity: In solution, it can conduct electricity owing to the presence of freely moving ions.

As noted in many descriptions of ionic compounds, "the greater the degree of ionization, the higher the solubility." This is precisely what is expected for triammonium hexafluoroaluminate (3-). It is important to consider the specific conditions under which solubility is assessed, as various factors including pH and ionic strength of the solution can significantly impact solubility.

In summary, triammonium hexafluoroaluminate (3-) exhibits high solubility in water, driven by its ionic nature and the favorable interactions between its constituent ions and the solvent.

Interesting facts

Interesting Facts about Triammonium Hexafluoroaluminate(3-)

Taking a closer look at triammonium hexafluoroaluminate(3-), this compound is a fascinating example of an inorganic salt that has various applications in chemistry and industry. Here are some interesting aspects:

  • Composition: This compound consists of three ammonium ions and one hexafluoroaluminate ion. The hexafluoroaluminate ion, denoted as AlF63-, plays a crucial role in the overall properties of the compound.
  • Complex Formation: Triammonium hexafluoroaluminate(3-) is known to form complexes with various metals, which can help in catalysis and other chemical reactions.
  • Industrial Uses: It has applications in the production of aluminum fluoride, which is essential in aluminum smelting and other industrial processes.
  • Environmental Role: The compound can serve as a chloride scavenger in certain reactions, demonstrating its utility in reducing waste and improving efficiency in chemical manufacturing.
  • Hydration Properties: The behavior of this compound in aqueous solutions can lead to interesting chemical interactions, making it a subject of study for those interested in solution chemistry.

As chemists continue to explore the properties and reactions of triammonium hexafluoroaluminate(3-), this compound remains emblematic of the complexity and diversity found within inorganic chemistry. Its unique composition and properties certainly make it worth studying!

Synonyms
Ammonium hexafluoroaluminate
7784-19-2
Ammonium cryolite
Aluminate(3-), hexafluoro-, triammonium, (OC-6-11)-
Ammonium fluoaluminate
Triammonium hexafluoroaluminate
Ammonium aluminum fluoride
Triammonium aluminum hexafluoride
Triammoniumhexafluoroaluminate(3-)
Hexafluoroaluminate(3-) triammonium
EINECS 232-052-7
NSC 310006
Aluminum ammonium fluoride (Al(NH4)3F6)
Ammonium hexafluoroaluminate ((NH4)3AlF6)
ALUMINATE(3-), HEXAFLUORO-, TRIAMMONIUM
SW274S3321
Aluminate(3-), hexafluoro-, ammonium (1:3), (OC-6-11)-
DTXCID901437059
ammonium hexafluoroaluminate [mi]
dtxsid401014476
nsc-310006
triammonium hexafluoroaluminate(3-)
triazanium;hexafluoroaluminum(3-)
Cryolite, triammonium
63692-16-0
UNII-SW274S3321
EINECS 264-415-0
MFCD00042144
ammonium hexafluoroaluminum(3-)
AMMONIUMHEXAFLUOROALUMINATE
AKOS015902487
NS00080790
A839241
Q1014242