. Carnegie Institution of Washington publication. 12 INFRA-RED REFLECTION SPECTRA. and 9 fi could be detected. The reflecting power is low, which is no doubt due to the presence of the silicate. The maxima at , , and y. are in common with those of malachite. The transmission curve of azurite is given in the preceding volume. It shows the OH band at 3 \i and the carbonate bands at and 4 \i. Dolomite [CaMg(C03)2]. (A plane cleavage piece. From Traversella, Italy. Curve a, fig. 4.) Dolomite is of interest because it is a double carbonate of Mg and Ca. The reflecting power is hi
. Carnegie Institution of Washington publication. 12 INFRA-RED REFLECTION SPECTRA. and 9 fi could be detected. The reflecting power is low, which is no doubt due to the presence of the silicate. The maxima at , , and y. are in common with those of malachite. The transmission curve of azurite is given in the preceding volume. It shows the OH band at 3 \i and the carbonate bands at and 4 \i. Dolomite [CaMg(C03)2]. (A plane cleavage piece. From Traversella, Italy. Curve a, fig. 4.) Dolomite is of interest because it is a double carbonate of Mg and Ca. The reflecting power is high. The first band is in common with that of 50% 40 C .2 30 'w20 cc 10 °A \ ⢠h \ i ."7 "-**- 1 â â- > 5 6 1 8 Fig. 4. â Dolomite (a); Siderite. IOJU CaC03, while the second band is to be found in MgCOo. The maxima occur at and fi. Siderite (FeC03). (Cleavage piece. From Allevard, France. Curve b, fig. 4.) The reflection curve of siderite is composed of a complex maxima similar to that of dolomite. The maxima occur at and /«.. Fig. 5. â Calcite (a); Magnesite. Calcite (CaCOa). (Curve a, fig. 5.) The reflection curve is obtained from a natural cleavage face of Iceland spar. The reflection band is complex with maxima at and fi. The reflection bands in the deep infra-red will be noticed presently. It is. 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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