[263] Zeitschr. physikal. Chem., 1890, 5. 322.
[264] Küster, Zeitschr. physikal. Chem., 1895, 17. 367. Bodländer, Neues Jahrbuch f. Mineralogie, 1898-99, Beilage Band, 12. 92.
[265] Bruni and Padoa, Atti Accad. Lincei, 1902 [5], 11. 1; 565.
[266] Roozeboom, Zeitschr. physikal. Chem., 1899, 30. 385; Bruni, Rend. Accad. Lincei, 1898, 2. 138, 347. For a general account of "solid solutions" the reader is referred to Bruni, "Ueber feste Lösungen" (Ahrens'sche Sammlung), and to Bodländer, loc. cit. For the formation and transformation of liquid mixed crystals, see A. C. de Kock, Zeitschr. physikal. Chem., 1904, 48. 129.
[267] In discussing the various systems which may be obtained here, Roozeboom (loc. cit.) made use of the variation of the thermodynamic potential (p. [29]) with the concentration. In spite of the advantages which such a treatment affords, the temperature-concentration diagram has been adopted as being more readily understood and as more suitable for an elementary discussion of the subject.
[268] These curves are also called the "liquidus" and the "solidus" curve respectively.
[269] Küster, Zeitschr. physikal. Chem., 1895, 17. 360.
[270] Küster, ibid., 1891, 8. 589.
[271] It should be remarked that the behaviour described here will hold strictly only when the solid mixed crystals undergo change sufficiently rapidly to be always in equilibrium with the liquid. This, however, is not always the case (see Reinders, Zeitschr. physikal. Chem., 1900, 32. 494; van Wyk, Zeitschr. anorg. Chem., 1905, 48. 25), and complete solidification will not in this case take place at the temperature corresponding with the line dc in Fig. 50, but only at a lower temperature.
[272] Adriani, Zeitschr. physikal. Chem., 1900, 33. 469.