Fluorapatit (Ca5F(PO4)3)

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Gefahrenhinweise

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P405：Unter Verschluss aufbewahren.

Fluorapatite (Ca5F(PO4)3) Chemische Eigenschaften,Einsatz,Produktion Methoden

• Beschreibung

  This apatite is formed by the same methods as the calcium apatite analog. The solid-state reaction required is:
  6SrHPO4 + 3SrCO3 + SrF2 + heat?Sr10F2(PO4)6 + 3CO2 + 3H2O
  It has also been prepared by the solution method:
  10SrF2 (aq) + 6Na3PO4 (aq)?Sr10(F)2(PO4)6 (solid) + 18NaF (aq) + 2HCl
  However, the product is contaminated by Na⁺ ions and must be washed thoroughly to obtain a pure product. A small amount of hydroxyapatite may also be present.
  Strontium fluorapatite has been shown to be one of the best hosts for Nd³⁺ doping among apatite crystals. Neodymium-doped strontium fluorapatite crystal has been grown by the Czochralski method. The data of thermal expansion and specific heat of the crystal have been measured. The thermal expansion coefficients along X and Z direction are a1 =11.4×10^-6/K and a3 = 12.3×10^-6/K, respectively. The specific heat is 110 cal/mol K at 330 K. The measured absorption spectra from 400 to 850 nm showed that the crystal has absorption peaks around 805.5 nm, and the absorption coefficients at 805.5 nm are 16.05/cm and 5.59/cm for p and a-polarization, respectively.
  Strontium fluoroapatite does not have a CAS number even though it is still used as a phosphor for compact and standard fluorescent lamps. It has been the subject of numerous academic studies but has found little or no usage in industry except those already mentioned.

• Chemische Eigenschaften

  fluoroapatite is a mineral for fluorine; can be prepared from CaCl2 and sodium monofluorophosphate; used as a laser crystal(s), may have the lowest energy threshold of any crystal(s) at room temp [KIR78] [HAW93]

• Verwenden

  Apatite is one of a few minerals produced and used by biological micro-environmental systems. The primary use of apatite is in the manufacture of fertilizer, it is a source of phosphorus. It is occasionally used as a gemstone. Green and blue varieties in finely divided form, are pigments with excellent covering power.

Fluorapatit (Ca5F(PO4)3) Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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