[134] Sitzungsber. Wiener Akad., 1894, 103. IIa. 226.
[135] Zeitschr. physikal. Chem., 23-29. See also Küster, ibid., 25-28.
[136] Zeitschr. physikal. Chem., 1897, 24. 152.
[137] Ibid., 1898, 27. 585.
[138] See W. Guertler, Zeitschr. anorgan. Chem., 1904, 40. 268; Tammann, Zeitschr. Elektrochem., 1904, 10. 532.
[139] E. von Pickardt, Zeitschr. physikal. Chem., 1902, 42. 17.
[140] Zeitschr. physikal. Chem., 1904, 48. 467.
[141] M. Padoa, Accad. Lincei, Atti, 1904, 13. 329.
[142] Deville, Compt. rend., 1852, 34. 561; Payen, ibid., 1852, 34. 508; Debray, ibid., 1858, 46. 576. It has also been found by Jaffé (Zeitschr. physikal. Chem., 1903, 43. 465) that when spontaneous crystallization from solution occurs, the less stable form always separates first when purification has been carried sufficiently far.
[143] Brauns, Neues Jahrbuch für Mineralogie, 1899, 13. (Beilage Band) 84.