diff --git a/schema/core/reusable/atomic_data_per_orbital.json b/schema/core/reusable/atomic_data_per_orbital.json
index fd2a058a2..2ec2aae41 100644
--- a/schema/core/reusable/atomic_data_per_orbital.json
+++ b/schema/core/reusable/atomic_data_per_orbital.json
@@ -18,5 +18,6 @@
             "pattern": "^[1-7][sSpPdDfF]$",
             "description": "Atomic orbital or Hubbard manifold."
         }
-    }
+    },
+    "required": ["id", "siteName", "orbitalName"]
 }
diff --git a/schema/core/reusable/atomic_data_per_orbital_pair.json b/schema/core/reusable/atomic_data_per_orbital_pair.json
index 9b1dcd6db..165daef5e 100644
--- a/schema/core/reusable/atomic_data_per_orbital_pair.json
+++ b/schema/core/reusable/atomic_data_per_orbital_pair.json
@@ -31,7 +31,8 @@
         },
         "distance": {
             "type": "number",
-            "description": "Distance between to sites in angstrom."
+            "description": "Distance between two sites in angstrom."
         }
-    }
+    },
+    "required": ["id", "id2", "siteName", "siteName2"]
 }