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<h1>The tutorial 4th</h1>
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<h2> Contents </h2>
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<h1>The tutorial 4th<a class="headerlink" href="#the-tutorial-4th" title="Link to this heading">#</a></h1>
<p>Illustrates the simulation features built into the package for refinement purposes.</p>
<blockquote>
<div><p>Note: For general-purpose diffraction simulation, please refer to the standalone toolkit</p>
</div></blockquote>
<section id="coding">
<h2>coding<a class="headerlink" href="#coding" title="Link to this heading">#</a></h2>
<blockquote>
<div><p><strong>1. Save your diffraction data to the root directory and rename the file to <code class="docutils literal notranslate"><span class="pre">intensity.csv</span></code>.</strong></p>
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># import PyXplore package</span>
<span class="kn">from</span> <span class="nn">PyXplore</span> <span class="kn">import</span> <span class="n">WPEM</span>
<span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span>
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<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>██╗ ██╗██████╗ ███████╗███╗ ███╗
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╚███╔███╔╝██║ ███████╗██║ ╚═╝ ██║
╚══╝╚══╝ ╚═╝ ╚══════╝╚═╝ ╚═╝
A Diffraction Refinement Software : WPEM
Bin Cao, Advanced Materials Thrust, Hong Kong University of Science and Technology (Guangzhou)
URL : https://github.com/Bin-Cao/WPEM
Executed on : 2025-07-22 11:13:26 | Have a great day.
====================================================================================================
</pre></div>
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<blockquote>
<div><p>Save the <code class="docutils literal notranslate"><span class="pre">.cif</span></code> file in the root directory and generate its powder diffraction pattern.</p>
</div></blockquote>
<div class="cell docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">_</span><span class="p">,</span><span class="n">_</span><span class="p">,</span><span class="n">_</span> <span class="o">=</span> <span class="n">WPEM</span><span class="o">.</span><span class="n">XRDSimulation</span><span class="p">(</span><span class="n">filepath</span><span class="o">=</span><span class="s1">&#39;Mn2O3.cif&#39;</span><span class="p">,</span><span class="n">two_theta_range</span><span class="o">=</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="mi">120</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">),</span><span class="n">bacI</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span><span class="n">GrainSize</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span><span class="n">orientation</span><span class="o">=</span><span class="p">[</span><span class="o">-</span><span class="mf">0.2</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">],</span><span class="n">thermo_vib</span><span class="o">=</span><span class="mf">0.2</span><span class="p">,</span><span class="n">zero_shift</span><span class="o">=</span><span class="mf">0.01</span><span class="p">)</span>
</pre></div>
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<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>the space group of input crystal is : I 21 3
cif file parse completed
atom locations claculated by parsed cif file
</pre></div>
</div>
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>retrieval of all reciprocal vectors satisfying the diffraction geometry is done
extinction peaks are distinguished
There are 43 extinction peaks
Diffraction condition judgment end !
The input crystal system is: Cubic | The initial lattice constants : 9.41 9.41 9.41 90.0 90.0 90.0
WPEM simulates the peaks as the default Voigt functions
Initilized with default peak&#39;s shape
The nearest neighbor atoms are : [&#39;Mn3+&#39;, &#39;O2-&#39;, 1.8337]
</pre></div>
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<img alt="../../_images/f4c785d068420e70ec2042397c3ff5b8b873c44328118d7a3929f902fefb3a10.png" src="../../_images/f4c785d068420e70ec2042397c3ff5b8b873c44328118d7a3929f902fefb3a10.png" />
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>XRD simulation process of WPEM is completed !
</pre></div>
</div>
<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Figure size 640x480 with 0 Axes&gt;
</pre></div>
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