Potassium Fluorosilicate (Properties, Applications)

Potassium fluorosilicate is a chemical compound with the chemical formula K2(SiF6) that belongs to the fluorosilicate family. It can be utilized as a fluoridizing agent in drinking water, as well as in the manufacture of synthetic cryolite and metal plating. It creates a narrow band red generating phosphor (commonly abbreviated PSF or KSF) when doped with potassium hexafluoromanganate(IV) ((K2(MnF6)), of commercial importance owing to its application in LED lighting and displays.

Potassium fluorosilicate is a white, odorless crystalline powder with a density greater than that of water. Skin, eyes, and mucous membranes may get irritated as a result of contact. It may be found on the Aeolian Islands (Sicily/Italy) as Hiereatite. Demartinite in a hexagonal shape has also been discovered on the rims of volcanic fumaroles on the same islands. Oral care ingredients, fluxing ingredients in porcelain enamels, and wood preservation components are all possible uses for potassium fluorosilicate. It’s also utilized in the production of ceramic materials and optical lenses.

It possesses space group Fm3m, according to (Loehlin, 1984), with a0 = 0.8134 nm and V = 0.538.2 nm3 at 295K. The length of the Si-F bond is 0.1683 nm. -beta and -gamma phases exist at high temperatures and pressures. Ingestion may be harmful; used to create other compounds. Potassium fluorosilicate’s oxidizing and reducing abilities are limited. However, redox reactions can still happen.

The majority of chemicals in this class are water-insoluble or just slightly soluble. If the solution is soluble in water, it is generally neither strongly acidic nor strongly basic. These chemicals do not react with water. Potassium fluorosilicate is used in the manufacturing of porcelain, the preservation of wood, the smelting of aluminum and magnesium, and as an intermediary in the production of optical glass.

Avoid skin contact; contact or inhalation effects may take time to manifest. Gases that are unpleasant, caustic, and/or poisonous may be produced by fire. Firefighting or diluting water runoff can be caustic and/or poisonous, resulting in pollution. A narrow band red phosphor emitting at about 630 nm is generated when potassium hexafluoromanganate(IV) (K2(MnF6) is doped.

This material can be used to improve the white light quality of white LEDs that employ a blue-emitting LED in conjunction with (YAG), Y3Al5O12:Ce3+, a yellow cerium doped yttrium aluminum garnet phosphor. The material itself is non-combustible, however, it may break down when heated, producing caustic and/or poisonous gases. When heated, containers have the potential to explode. Runoff has the potential to contaminate rivers.

Co-crystallisation and co-precipitation are two phosphor synthesis methods. To co-precipitate, the phosphor, K2(MnF6) dissolved in (40 percent ) hydrofluoric acid with potassium fluoride can be combined with SiO2 dissolved in (40 percent ) hydrofluoric acid. If skin or eyes come into contact with the material, flush them with running water for at least 20 minutes. Avoid spreading material on unaffected skin when it comes to minimal skin contact.

Maintain the victim’s calm and warmth. The effects of drug exposure (inhalation, ingestion, or skin contact) may take time to manifest. Vomiting and diarrhea are possible side effects of ingestion. It’s a potent irritant. Hydrofluoric acid is incompatible. It emits poisonous gases of SiF4, K3SiF7, and KF when heated to breakdown.

Information sources:

  1. pubchem.ncbi.nlm.nih.gov
  2. chemicalbook.com
  3. wikipedia