Izvorni znanstveni članak

The Influence of Manganese and Silicon on Some Physicochemical Properties of Aluminophosphates Having the Sodalite Structure

Jurka Batista ; Boris Kidrič Institute of Chemistry, P.O. Box 30, 61115 Ljubljana, Slovenia (YU)
Venčeslav Kaučič ; Boris Kidrič Institute of Chemistry, P.O. Box 30, 61115 Ljubljana, Slovenia (YU)
Stanko Hočevar ; Boris Kidrič Institute of Chemistry, P.O. Box 30, 61115 Ljubljana, Slovenia (YU)

Sažetak

Aluminophosphate and silicoaluminophosphate materials of the sodalite structure type with manganese have been synthesized. A comparative study of A1PO4-20, AlPO4-20(Mn), SAPO-20, and SAPO-20(Mn) properties has been carried out by using the X-ray powder diffraction analysis, SEM, qualitative EDAX-micro analysis, chemical and thermal analysis, IR, EPR and diffuse reflectance spectroscopy. Chemical modification of AIPO4-2O with manganese and silicon leads to changes in the cubic unit cell parameters and in the thermal properties. The EPR and DRS data for as-synthesized AlP04-20(Mn) and SAPO-20(Mn) materials show the presence of octahedrally coordinated non-framework Mn, while the unit cell parameter data and the thermal behaviour of the samples are not so conclusive regarding the location of Mn.

Ključne riječi

Hrčak ID:

137302

URI

https://hrcak.srce.hr/137302

Datum izdavanja:

15.10.1991.

Posjeta: 807 *