diff --git a/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs b/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
index 1d7b8d2..278293e 100644
--- a/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
+++ b/src/Chemistry/Mixtures/Implements/HomogeneousMixture.cs
@@ -235,6 +235,22 @@ public class HomogeneousMixture
         get => Energy / Amount;
         set => Energy = value * Amount;
     }
+
+    /// <summary>
+    /// combust rate
+    /// </summary>
+    public double CombustRate
+    {
+        get
+        {
+            H3 w = StateMatrix.Get!.ConjugateOn(new DiagR3(0, Math.PI, 2 * Math.PI));
+            return w.Rayleigh(
+                LogStateMatrix.Get!.ColumnAverageBivariant +
+                StateMatrix.Get.Hermitian().ColumnAverageBivariant
+            );
+        }
+    }
+
     /// <summary>
     /// total Energy the mixture holds 
     /// </summary>