<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\displaystyle {\mathsf {\Theta }}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mi mathvariant="sans-serif">&#x0398;<!-- Θ --></mi>
          </mrow>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {\Theta }}}</annotation>
  </semantics>
</math>
['ISO 80000-12:2019 Quantities and units — Part 12: Condensed matter physics', '<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\\displaystyle {\\mathsf {\\Theta }}}">\n  <semantics>\n    <mrow class="MJX-TeXAtom-ORD">\n      <mstyle displaystyle="true" scriptlevel="0">\n        <mrow class="MJX-TeXAtom-ORD">\n          <mrow class="MJX-TeXAtom-ORD">\n            <mi mathvariant="sans-serif">&#x0398;<!-- Θ --></mi>\n          </mrow>\n        </mrow>\n      </mstyle>\n    </mrow>\n    <annotation encoding="application/x-tex">{\\displaystyle {\\mathsf {\\Theta }}}</annotation>\n  </semantics>\n</math>', '?']