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The decomposition of the Ethiopian Kenticha tantalite ore was studied using the KOH fusion and H 2 O leaching system at 400 0 C for a 1 h reaction time. The experimental results obtained showed that 27 wt% of Ta 2 O 5 was mainly transformed into insoluble KTaO 3 , not to be KNbO 3 , and as well, into the dissolved liquor containing 94.73 vol% of Nb 2 O 5 and 75.80 vol% of Ta 2 O 5 . The observations, supported by the EDXRF, XRD, and ICP-OES techniques, showed that the ratio of the dissolveddoi:10.1149/1.3491279 fatcat:mnr3x5ukije5zgxjychf2xki7a