. Carnegie Institution of Washington publication. CHAPTER II. INFRA-RED REFLECTION SPECTRA OF VARIOUS SUBSTANCES. SULPHATES. (CaSO*+H2O). Cleavage piece1 cut parallel to b axis. The curve a, fig. 60, shows a uniform decrease in reflection to 7 ju., then an abnormal decrease to /*. The maximum occurs at ^ (Aschkinass, /A), and from its lack of symmetry may be complex. In fact, from what follows one would 70%. 6 7 a 9 IO FIG. 60.—Selenite (a); Barite. 12 expect another band at ;«,, which is of frequent occurrence, and is harmonic with the SO4 band at /*. In a recent research b
. Carnegie Institution of Washington publication. CHAPTER II. INFRA-RED REFLECTION SPECTRA OF VARIOUS SUBSTANCES. SULPHATES. (CaSO*+H2O). Cleavage piece1 cut parallel to b axis. The curve a, fig. 60, shows a uniform decrease in reflection to 7 ju., then an abnormal decrease to /*. The maximum occurs at ^ (Aschkinass, /A), and from its lack of symmetry may be complex. In fact, from what follows one would 70%. 6 7 a 9 IO FIG. 60.—Selenite (a); Barite. 12 expect another band at ;«,, which is of frequent occurrence, and is harmonic with the SO4 band at /*. In a recent research by Koch,2 who used a reflection band as a source of energy in an interferometer, there are indications that the band of selenite at ju is complex. 1 In the present discussion "cleavage piece" signifies that the natural unpolished surface was used. 'Koch: Ann. der Phys. (4), 17, p. 658, 1905. 77. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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