The holotype roggianite from Alpe Rosso (Novara, Italy) has been chemically re-analysed using modern analytical procedure (microprobe, atomic absorption,spectrophotometer, TG analyses) and tested for its zeolitic behaviour. When compared with that given in the original description, the new chemical composition shows an appreciable amount of Be and a different Si/Al ratio. An accurate powder pattern is also given. Since the mineral showed an almost complete rehydration after heating at 750°C and an appreciable ion exchange capacity, it must be considered a zeolite. It is the only zeolite with Be as fundamental constituent and with OH groups in the frameworl like partheite.
Roggianite: revised chemical formula and zeolitic properties / Passaglia, Elio; Vezzalini, Maria Giovanna. - In: MINERALOGICAL MAGAZINE. - ISSN 0026-461X. - STAMPA. - 52:(1988), pp. 201-206.
Roggianite: revised chemical formula and zeolitic properties
PASSAGLIA, Elio;VEZZALINI, Maria Giovanna
1988
Abstract
The holotype roggianite from Alpe Rosso (Novara, Italy) has been chemically re-analysed using modern analytical procedure (microprobe, atomic absorption,spectrophotometer, TG analyses) and tested for its zeolitic behaviour. When compared with that given in the original description, the new chemical composition shows an appreciable amount of Be and a different Si/Al ratio. An accurate powder pattern is also given. Since the mineral showed an almost complete rehydration after heating at 750°C and an appreciable ion exchange capacity, it must be considered a zeolite. It is the only zeolite with Be as fundamental constituent and with OH groups in the frameworl like partheite.
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