ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 17, Number 2
JKCSEZ 17(2)
April 20, 1973 

A study on the endothermic peak of transformation of the pyrolusite was made by using differential thermal curves for analytical reproducibility, and it was done in quantity on range from 50 mg to 450 mg of pyrolusite species. The separation of α-MnO2 peak was impossible due to the overlapping between α and pyrolusite peaks, and the pyrolusite was determined among the species, γ-MnO2 and δ-MnO2, with an error ranging from 5 % to 10 %.