Binary mixtures with alkali fluorides

0 x l) mixtures, (a) coordination number, (b) inter-ionic distance, (c) Debye-Waller factor, and (d) cumu- 

With decreasing the concentration of ThF4, both a and C3 decrease, and the values in the ThF4-NaF system are smaller than those in the ThF4-LiF system in general. These features have been also confirmed in mixture systems including TbF3 [12], 

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The typical V-curve for eutectic mixtures is obtained with mixtures of potassium chloride with 39 per cent, of potassium fluoride at 605° 76 of potassium bromide at 740° 69 3 of potassium iodide at 580° and 42 8 of potassium sulphate at 705°. Results with binary mixtures of the alkali chlorides are indicated in the accompanying Table XVIII, where the eutectic temp, is bracketed with the atomic percentage of the element indicated on the same horizontal line S means that an unbroken series of solid soln. are formed otherwise, solid soln. are wanting. 

A series of binary, ternary, and even quaternary fluorides have been crystallized from melts. In most cases, chlorides or mixtures of chlorides are used because of their lower melting points and greater solubilities with respect to corresponding fluorides. It is advantageous to add an excess of the alkali chloride when an alkali fluorometalate is synthesized, as shown in the typical example of equation (9). ... 

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