Spektralphotometrische Untersuchung der Systeme NiF2/Erdalkalifluoride sowie des Systems CaF2/CoF2

摘要

The light absorption of the phases occurring in the systemsMF2/NiF2(M=Ba, Sr, Ca) has been investigated. The colour curves of Ba2NiF6(I) and of BaNiF4(II) show characteristic differences. The colour curve of SrNiF4is similar to that of II. The colour curves of the system CaF2/NiF2are compared with those of the system CaF2/CoF2. From the colour curve of the latter system one can unambiguously infer that mixed cristals Ca1−xCoxF2(x≤0,01) exist. No evidence could be found for the existence of mixed cristals Ca1−xNixF2by the spectrophtometric m