From 5f764268e3b7c243e1ce821f2e8eca9db263209e Mon Sep 17 00:00:00 2001
From: First Coder <shyuep@gmail.com>
Date: Mon, 8 Mar 2021 16:09:02 -0800
Subject: [PATCH] Small change to how the ionization energies are obtained.

---
 pymatgen/core/periodic_table.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pymatgen/core/periodic_table.py b/pymatgen/core/periodic_table.py
index a2da0afd8c5..3441b61a379 100644
--- a/pymatgen/core/periodic_table.py
+++ b/pymatgen/core/periodic_table.py
@@ -301,7 +301,7 @@ def ionization_energy(self) -> float:
         """
         First ionization energy of element.
         """
-        return self.ionization_energies[0]  # pylint: disable=E1101
+        return self._data["Ionization energies"][0] 
 
     @property
     def electronic_structure(self) -> str: