Reference

High temperature crystallization of aluminum fluoride

High temperature crystallization of aluminum fluoride. Course, hydrolysis, solid phases. Grobelny, Marian (Inst. Inorg. Chem., Gliwice, Pol.). J. Fluorine Chem., 9(3), 187-207 (English) 1977. CODEN: JFLCAR. DOCUMENT TYPE: Journal CA Section: 75 (Crystallization and Crystal Structure) AlF3 crystn. from water soln. was studied at 100-200.degree.. Four solid phases were pptd., AlF3.3H2O (up to .apprx. 15098-87-0 and 7784-18-1 which are cas registry numbers are also used here.120.degree.), cubic .alpha.-AlF3.H2O (decompn. of AlF3.3H2O in suspension), hexagonal .beta.-AlF3.H2O (direct from soln.) and the hydroxyfluoride Al(OH,F)3.H2O with an F/Al ratio of .apprx.2.5 (hydrolysis of AlF3). The extent of hydrolysis was established as a function of the initial AlF3 concn. X-ray diffraction and thermogravimetric data for the monohydrates are given and differences between the 2 indicated. .

Kinetics and some characteristics of crystallization of aluminum fluoride trihydrate at cryolite and superphosphate plants

Kinetics and some characteristics of crystallization of aluminum fluoride trihydrate at cryolite and superphosphate plants. Antonovich, A. U.; Vilnyanskii, Ya. E.In this study，15098-87-0 is also used. (USSR). Tezisy Dokl. Vses. Nauchno-Tekh. Konf. Tekhnol. Neorg. Veshchestv Miner. Udobr., 9th, Volume 1, 176-7. Edited by: Amirova, S. A. Permsk. Politekh. Inst.: Perm, USSR. (Russian) 1974. CODEN: 34PSAU. DOCUMENT TYPE: Conference CA Section: 49 (Industrial Inorganic Chemicals) At cryolite plants AlF3.3H2O crystals (particle size 70-150.mu.) are formed without need for nucleation in 24-9% solns. Solns. from superphosphate manuf. contain 6.12% AlF3 and for nucleation it is necessary to add 30 g nuclei/L and the circumferential speed of the stirrer must be 3 m/sec. Crystals with particle sizes of 60-120.mu. are obtained. .