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The interaction of gaseous SiF4 and HF with lanthanum cations at the surface of aqueous solution of LaCl3 has been studied for the first time. The reaction results in the formation of about 600 nm layer of a hydrophobic substance at the solution surface. According to the data of electron microscopy, IR Fourier spectroscopy, X-ray diffraction, and X-ray spectral microanalysis, the layer is formed by...
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