Abstract
The effect of sintering temperature on crystal structure and grain size of manganese seed originating from West Sumatera has been investigated using X-ray Diffractometer (XRD). This investigation is important in relation to the emergence of new phases of economic value at a certain temperature. The sintering temperature variations used are 600°C, 700°C, 800°C, 900°C, and 1000°C, respectively. The result of manganese ore investigation is known that sintering temperature variation, there is no change of structure from phases found in manganese ore which are equally tetragonal but there is change of grain size from the existing phases. For bixbyite and rhodonite phases, the grain size decreases with increasing sintering temperature. As for rhodonite and hausmannite phases, the grain size tends to increase with increasing sintering temperature.
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