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<title>ATC: fix_modify AtC atom_weight</title>
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<h1><a class="anchor" id="man_atom_weight">fix_modify AtC atom_weight </a></h1><h2><a class="anchor" id="syntax">
syntax</a></h2>
<p>fix_modify AtC atom_weight &lt;method&gt; &lt;arguments&gt;</p>
<ul>
<li>&lt;method&gt; = <br/>
value: atoms in specified group assigned constant value given <br/>
lattice: volume per atom for specified lattice type (e.g. fcc) and parameter <br/>
element: element volume divided among atoms within element <br/>
region: volume per atom determined based on the atom count in the MD regions and their volumes. Note: meaningful only if atoms completely fill all the regions. <br/>
group: volume per atom determined based on the atom count in a group and its volume<br/>
read_in: list of values for atoms are read-in from specified file <br/>
</li>
</ul>
<h2><a class="anchor" id="examples">
examples</a></h2>
<p><code> fix_modify atc atom_weight constant myatoms 11.8 </code> <br/>
<code> fix_modify atc atom_weight lattice </code> <br/>
<code> fix_modify atc atom_weight read-in atm_wt_file.txt </code> <br/>
</p>
<h2><a class="anchor" id="description">
description</a></h2>
<p>Command for assigning the value of atomic weights used for atomic integration in atom-continuum coupled simulations. </p>
<h2><a class="anchor" id="restrictions">
restrictions</a></h2>
<p>Use of lattice option requires a lattice type and parameter is already specified. </p>
<h2><a class="anchor" id="related">
related</a></h2>
<h2><a class="anchor" id="default">
default</a></h2>
<p>lattice </p>
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