BEHAVIOR OF MICROPOROUS ZIRCONOSILICATE HILAIRITE UNDER HIGH PRESSURE
Yu. V. Seryotkin1,2, V. V. Bakakin3, I. V. Pekov4
1Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University, Russia
3Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
4Moscow State University, Russia
Keywords: к цирконосиликат, илерит, кристаллическая структура, высокое давление, zirconosilicate, hilairite, crystal structure, high pressure
Abstract
The behavior of natural zeolite-like hetero-framework zirconosilicate hilairite |Na
1.47H
0.53(H
2O)
2.7| [ZrSi
3O
9] is studied by single crystal X-ray diffraction at a high pressure (up to 4.73 GPa): space group
R3,
a = 10.5667(2) Å,
c = 15.9109(4) Å,
V = 1538.54(6) Å
3,
Z = 6. The compression of hilairite is practically isometric in the whole pressure range studied and is close to linear. Above 3.5 GPa an increasing deterioration of the single crystal is observed, which is interpreted as the started first order phase transition accompanied by significant volumetric changes.
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