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Coeficiente de partição do Ca entre leucita, sanidina, fusão sílico-sanidínica e solução hidrotermal a 2kb e altas temperaturas (920º E 1030ºC)

1990; Volume: 21; Linguagem: Inglês

10.11606/issn.2316-8986.v21i0p1-12

ISSN

2316-8986

Autores

Ana Helena Pacheco Moreira, F Delbove, José Vicente Valarelli,

Tópico(s)

Mesoporous Materials and Catalysis

Resumo

Results of synthesis experiments of leucite (Lc), sanidine (San) and fused sanidine, the latter with slightly excess SiO2 are reported. Starting materiais were amorphous oxide gels with the appropriate stoichiometric compositions in contact with KCl hydrothermal solutions (HS) containing variable amounts of tagged CaCl2(45Ca) at pressures of 2 kbars and temperatures of 930º and 1030ºC. The distribution coefficients ; were obtained from the Ca/K ratios measured in both ideal synthesized materiais and solutions. The results were as follows: ; and

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