diff --git a/pyiron_atomistics/atomistics/structure/periodic_table.py b/pyiron_atomistics/atomistics/structure/periodic_table.py
index 9f48690fa..c11884731 100644
--- a/pyiron_atomistics/atomistics/structure/periodic_table.py
+++ b/pyiron_atomistics/atomistics/structure/periodic_table.py
@@ -119,6 +119,7 @@
     "proton_affinity",
     "protons",
     "registry",
+    "scattering_factors",
     "sconst",
     "screening_constants",
     "series",
@@ -138,6 +139,7 @@
     "vdw_radius_rt",
     "vdw_radius_truhlar",
     "vdw_radius_uff",
+    "zeff",
 ]