材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
ハロゲン含有アルカリ硼酸塩ガラス中のコバルトの分光特性
功刀 雅長大田 陸夫小川 智司
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1971 年 20 巻 215 号 p. 975-981

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The conversion of octahedral cobalt (II) into tetrahedral symmetry has been studied in alkali borate glass, i. e., Li2O-B2O3, Na2O-B2O3, K2O-B2O3, with addition of halide by processing absorption spectroscopy in the ranging of wavelength 350-2000 millimicrons. The results of measurement are shown in Fig. 3-Fig. 11. Addition of halide to alkali borate glass intensifies the cobalt (II) absorption and modifies the absorption spectra considerably. In the two kinds of glass 10Na2O·90B2O3 and 20Na2O·80B2O3 (mol. %), with halogen X (X=Cl, Br or I) ingredient, the co-ordination number of cobalt (II) converts the octahedral into the tetrahedral configuration present as CoO6→CoX4. In the glass 30Na2O·70B2O3 the addition of halogen causes decrease in intensity of absorption spectra with increase in halogen concentration as the result of the changing CoO4→CoO6→CoX4. The effect of varying the kind of alkali is negligible. The density of the glass in degree was also determined.

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