APPLICATION OF k0 -INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS  FOR DETERMINATION OF MAJOR AND TRACE ELEMENTS  IN SOME MANGANESE MINERALS

Radojko Jaćimović; Milena Taseska-Gjorgjijevski; Trajče Stafilov; Gligor Jovanovski; Petre Makreski

Radojko Jaćimović Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
Milena Taseska-Gjorgjijevski Institute of Agriculture, Ss. Cyril and Methodius University, Blvd. Aleksandar Makedonski b.b., MK-1000, Skopje, R. Macedonia
Trajče Stafilov Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss Cyril and Methodius University, Arhimedova 5, Skopje, R. Macedonia
Gligor Jovanovski Research Center for Environment and Materials, Macedonian Academy of Sciences and Arts, Blvd. Krste Misirkov 2, 1000 Skopje, R. Macedonia
Petre Makreski Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss Cyril and Methodius University, Arhimedova 5, Skopje, R. Macedonia

Abstract

The content of major, minor and various trace elements in three manganese minerals from the Republic of Macedonia was determined. The studied minerals belong to the carbonate group [kutnohorite, Ca(Mn2+, Mg,Fe2+)(CO3)2, from Sasa mine] and to the inosilicate subgroup [carpholite, Mn2+Al2Si2O6(OH)4, from Vrbsko locality; rhodonite (Mn2+,Fe2+,Mg,Ca)SiO3, from Sasa mine]. Carousel facility of the 250 kW TRIGA reactor and multielement technique k0-instrumental neutron activation analysis (k0-INAA) were used for irradiation and for the determination of the elements content. Using intermediate/medium and long half-life radionuclides, in total, thirtyeight elements in the investigated minerals were determined. The content of As, Co, Ga, K, Na, Sc and Zn in carpholite, of As, K, Na, Ta, W and Zn in rhodonite and of Hg, Sr, Ta and REEs in kutnohorite was found to be higher compared to the other investigated trace elements. It was also found that kutnohorite contains lower amounts of trace elements compared with their content in carpholite and rhodonite.

Key words: carpholite; rhodonite; kutnohorite; Macedonia; k0-INAA

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