Abstract
A STUDY of the flame and arc spectra of chlorides, nitrates and oxides of calcium and strontium, in the first order of 10 ft., and 21 ft., gratings, indicates that the spectra of the halides are mixed up with those of the oxides, particularly in the strontium salts; the mixed spec ra appear to be present even in spectrograms taken for the halide with arc in an atmosphere of hydrogen1. This has caused many bands due to the oxide to be mistaken for SrCl bands. The anomalous doublet separation (˜ 600 cm.-1) observed2 in SrCl seems to be due to such a complicated disposition of the oxide and halide bands. If the oxide bands are fully eliminated, it appears possible to arrange the bands in a system with a doublet separation of the order of 260 cm.-1, which is a reasonable extrapolation for the expected doublet level. Work is in progress and a detailed description of the spectra will be published elsewhere.
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