| Popis: |
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 SrNiF4 is similar to that of II. The colour curves of the system CaF2/NiF2 are 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−xNixF2 by the spectrophtometric method. |
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