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    Characterizing the intrinsic and the one-dimensional heterogeneities of a niobium ore based on Pierre Gy’s Theory of Sampling by Ana Carolina Chieregati, Rafael Vaz Dias, Yuntang Lan

    Published 2025-01-01
    “…Results indicated that the 5-minute sampling interval was appropriate, resulting in a low relative standard deviation of HFE, i.e., 2.26% for Nb2O5, considering a 95% confidence interval. This article shows how to estimate the zeroand one-dimensional heterogeneities of ores and how important it is to define the precision associated with the grade estimates for process control, metallurgical accounting and reconciliation purposes.…”
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