Assertion: cryolite | /r/HasProperty | precipitated in atmosphere
Facets:
Source sentences:
text: The synthetic cryolite thus obtained has a NaF/AIF molar ratio equal to about 3 and physical characteristics (e.g. heat stability) very close to those of natural cryolite, and in addition the precipitation yields are high even if chloride is used as sodium salt, that is, even if the cryolite is precipitated in an atmosphere containing at the free state the hydro chloric acid, which, as known, is formed by the reaction between sodium chloride and fluoaluminic acid, the fluoaluminic acid solution, prepared for example by dissolving aluminum oxide or hydrate in hydrofluoric acid, has an HI /A11 molar ratio equal to 3, that is, not lower than the NaF/AlF molar ratio which it is desired to obtain in the synthetic cryolite.