Titre du document / Document title

Modeling of the hypergenesis process on volcano-surface with use of vacuum [by example of lesukite Al₂(OH)₃Cl2H₂O]

Auteur(s) / Author(s)

FILATOV S. K. ; PAUFLER P. ; VERGASOVA L. P. ; LEVIN A. A. ; YANSON O. M. ; MEYER D. C. ;

Résumé / Abstract

The new bauxite mineral - lesukite Al₂(OH)₅Cl.2H₂O - was investigated in vacuum (down to 10^-7 bar), experiment 1, and forevacuum (down to 10^-5 bar), experiment 2, at room temperature. It is shown, that in case of atmosphere conditions lesukite dehydrates and becomes decomposed at +140 °C, but in vacuum conditions (10^-6-10^-7 bar) its dehydration and amorphisation occur even at room temperature; dehydration is accompanied by decrease of the cubic cell parameter (a = 19.82 A) by 1 Å (5 %). So vacuum treatment may be used for «pumping out» the weak-bonded water from the matter, like heating. Dehydration in vacuum may be proceeded at lower temperatures than in atmosphere conditions. This fact may be of interest in geology and technology.

Revue / Journal Title

Zapiski Vserossijskogo mineralogičeskogo obŝestva   ISSN 0869-6055 

Source / Source

2005, vol. 134, n^o2, pp. 104-109 [6 page(s) (article)]

Langue / Language

Russe

Editeur / Publisher

Nauka, Sankt-Peterburg, RUSSIE, FEDERATION DE  (1992) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 4673, 35400013476156.0090