added column width rad/T

added diffusion constants

isotables/isotopapp/templates/diffusion.html

@@ -0,0 +1,29 @@
+{% extends 'base.html' %}
+{% block content %}
+
+<div class="container">
+    <h1>Diffusion coefficient</h1>
+  <h2>  {{ standard_name|safe }} </h2>
+    <table class="table w-auto table-responsive-sm table-striped table-hover table-bordered">
+        <caption>
+          Holz et al. Phys. Chem. Chem. Phys., 2000, 2, 4740-4742
+        </caption>
+        <thead class="table-dark">
+        <tr>
+            <th scope="col">T/K</th>
+            <th scope="col">T/°C</th>
+            <th scope="col">D/m²s⁻¹</th>
+        </tr>
+        </thead>
+        <tbody>
+
+        <tr>
+            <td>{{ temperature_kelvin|stringformat:".2f" }}</td>
+            <td>{{ temperature_celsius|stringformat:".2f" }}</td>
+            <td>{{ diffusion_constant|stringformat:".3e" }}</td>
+        </tr>
+
+        </tbody>
+    </table>
+</div>
+{% endblock %}

isotables/isotopapp/templates/result.html

@@ -1,5 +1,4 @@
 {% extends 'base.html' %}
-
 {% block content %}
 
 <div class="container">

isotables/isotopapp/templates/sfg.html

@@ -1,6 +1,7 @@
 {% extends 'base.html' %}
 {% block content %}
 <div class="container text-left">
+    <form action="diffusion" id="diffusion_form">
     <h1>SFG Position Calculator</h1>
 
     <form action="position">
@@ -49,15 +50,27 @@
                         <option value="magnex_profile.dat">Magnex</option>
                 </select>
             </div>
-        </div>
-        <div class="row row-cols-6">
-            <label class="form-label">Gradient in T/m:<br>(assuming &#x2300;5mm)</label>
-<!--            <div class="col"><input type="number" name="gradient" class="form-control" step="any"
-                                    placeholder="Gradient in T/m"></div>-->
             <div class="col">
                 <button type="submit" name="gradient_search" class="btn btn-primary btn-sm">Get position</button>
             </div>
         </div>
+        <div class="row row-cols-6">
+            <div class="col">
+              <select name="standard" class="form-select" size="1" form="diffusion_form">
+                        <option value="h2o">D(H2O)</option>
+                        <option value="tetradecane">D(Tetradecane)</option>
+                        <option value="pentanol">D(Pentanol)</option>
+                        <option value="dodecane">D(Dodecane)</option>
+                        <option value="dioxane">D(Dioxane)</option>
+                        <option value="dmso">D(DMSO)</option>
+                </select>
+            </div>
+            <div class="col">
+                <input type="number" name="temperature" class="form-control" step="any" placeholder="T/K" form="diffusion_form"></div>
+            <div class="col">
+                <button type="submit" name="diffusion_search" class="btn btn-primary btn-sm" form="diffusion_form">Get diffusion coefficient</button>
+            </div>
+        </div>
     </form>
 </div>
 <div>