Synthesis and solubility of brompyromorphite Pb5(PO4)3Br

• Autorzy: Janicka U. , Bajda T. , Manecki M.

Identyfikatory

DOI

10.2478/v10002-012-0004-4

• Języki publikacji: EN

Abstrakty

EN

The bromide analogue of pyromorphite Pb5(PO4)3Br was synthesized and characterized by X-ray diffraction, infrared spectroscopy and scanning electron microscopy. The solubility of the brompyromorphite was measured at 25°C and pH values of 2.0, 2.6 and 3.2. For the 3 pH measurements, the average solubility product, log KSP, for the reaction Pb5(PO4)3Br ⇔ 5Pb2+ + 3PO4 3– + Br– at 25ºC is –77.38 ± 0.70. The free energy of formation, ΔG˚f,298, calculated from this measured solubility product is –3724.7 ± 4.3 kJ mol−1. These results confirm that brompyromorphite is more soluble than pyromorphite.

Słowa kluczowe

EN

lead; phosphate; apatite; dissolution; brompyromorphite; solubility product

• Wydawca: Mineralogical Society of Poland
• Czasopismo: Mineralogia
• Rocznik: 2012
• Tom: Vol. 43, iss. 1/2
• Strony: 129--135
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Janicka U.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30, 30–059 Krakow, Poland

autor

Bajda T.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30, 30–059 Krakow, Poland

autor

Manecki M.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30, 30–059 Krakow, Poland

Bibliografia

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