diff --git a/src/utils/split_nuclide.py b/src/utils/split_nuclide.py
index cc8e9eb300..32d4cb1493 100755
--- a/src/utils/split_nuclide.py
+++ b/src/utils/split_nuclide.py
@@ -12,7 +12,7 @@ ao = float(sys.argv[2])
 for line in open('abundances_modified.txt','r'):
     words = line.split()
     if words[1] == element:
-        print('<nuclide name="{0}-{1}" ao="{2}" />'.format(
+        print('<nuclide name="{0}-{1}" ao="{2:10.4e}" />'.format(
                 element, words[2], float(words[3])*ao*0.01))