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<section id="module-pymatgen.analysis.hhi">
<span id="pymatgen-analysis-hhi-module"></span><h1>pymatgen.analysis.hhi module<a class="headerlink" href="#module-pymatgen.analysis.hhi" title="Permalink to this heading"></a></h1>
<p>This module is used to estimate the Herfindahl-Hirschman Index, or HHI, of
chemical compounds. The HHI is a measure of how geographically confined or
dispersed the elements comprising a compound are. A low HHI is desirable
because it means the component elements are geographically dispersed.</p>
<p>Data/strategy from “Data-Driven Review of Thermoelectric Materials:
Performance and Resource Considerations” by Gaultois et al., published
in Chemistry of Materials (2013).</p>
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