Hydrothermal synthesis and characterization of nitrite sodalite single crystals

verfasst von: J. Ch Buhl
Abstract: Single crystals of nitrite sodalite Na₈[AlSiO₄]₆(NO₂)₂ prepared hydrothermally at 570 K and 0.1 GPa show cubic symmetry (a₀ = 8.931(2) A ̊) and complete ordering of the framework T atoms (SG P43n). The thermal properties have been characterized by simultaneous thermal analysis (TG, DTG, DTA) and high temperature X-ray powder diffraction. Heating in air yields a nitrite/nitrate sodalite according to the oxidation of the enclosed salt molecules. This intra-cage reaction is characterized by IR spectroscopy and thermogravimetry under open system conditions. Additional X-ray powder diffraction data (Guinier-Simon heating technique) indicate an expansion of the sodalite framework during this formation of nitrate within the β-cages at 1000 K. The thermal decomposition of nitrite sodalite in an inert atmosphere (argon) occurs in the 950-1100 K interval, yielding a stuffed carnegieite phase.
Organisationseinheit(en): Institut für Mineralogie
Externe Organisation(en): Westfälische Wilhelms-Universität Münster (WWU)
Typ: Artikel
Journal: Journal of crystal growth
Band: 108
Seiten: 143-149
Anzahl der Seiten: 7
ISSN: 0022-0248
Publikationsdatum: 02.01.1991
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik der kondensierten Materie, Anorganische Chemie, Werkstoffchemie
Elektronische Version(en): https://doi.org/10.1016/0022-0248(91)90362-9 (Zugang: Geschlossen)

BibTeX

@article{09eda58889f644a0871bb40062bf1b75,
title = "Hydrothermal synthesis and characterization of nitrite sodalite single crystals",
abstract = "Single crystals of nitrite sodalite Na8[AlSiO4]6(NO2)2 prepared hydrothermally at 570 K and 0.1 GPa show cubic symmetry (a0 = 8.931(2) A ̊) and complete ordering of the framework T atoms (SG P43n). The thermal properties have been characterized by simultaneous thermal analysis (TG, DTG, DTA) and high temperature X-ray powder diffraction. Heating in air yields a nitrite/nitrate sodalite according to the oxidation of the enclosed salt molecules. This intra-cage reaction is characterized by IR spectroscopy and thermogravimetry under open system conditions. Additional X-ray powder diffraction data (Guinier-Simon heating technique) indicate an expansion of the sodalite framework during this formation of nitrate within the β-cages at 1000 K. The thermal decomposition of nitrite sodalite in an inert atmosphere (argon) occurs in the 950-1100 K interval, yielding a stuffed carnegieite phase.",
author = "Buhl, {J. Ch}",
year = "1991",
month = jan,
day = "2",
doi = "10.1016/0022-0248(91)90362-9",
language = "English",
volume = "108",
pages = "143--149",
journal = "Journal of crystal growth",
issn = "0022-0248",
publisher = "Elsevier",
number = "1-2",
}