diff --git a/semantica/export/rdf_exporter.py b/semantica/export/rdf_exporter.py
index c5f95ed6..5b2b1585 100644
--- a/semantica/export/rdf_exporter.py
+++ b/semantica/export/rdf_exporter.py
@@ -516,9 +516,9 @@ class RDFSerializer:
             rel_type = rel.get("type", DEFAULT_RELATION_TYPE)
 
             lines.append(
-                f"<{self._as_turtle_iri(source_id)}> "
-                f"<{self._as_turtle_iri(rel_type)}> "
-                f"<{self._as_turtle_iri(target_id)}> ."
+                f"<{self._as_turtle_iri(source_id, merged_namespaces)}> "
+                f"<{self._as_turtle_iri(rel_type, merged_namespaces)}> "
+                f"<{self._as_turtle_iri(target_id, merged_namespaces)}> ."
             )
 
             if include_temporal:
diff --git a/tests/export/test_rdf_exporter_turtle_iris.py b/tests/export/test_rdf_exporter_turtle_iris.py
index ccf27a82..6faa3d72 100644
--- a/tests/export/test_rdf_exporter_turtle_iris.py
+++ b/tests/export/test_rdf_exporter_turtle_iris.py
@@ -56,3 +56,22 @@ def test_turtle_preserves_absolute_iris():
         RDF.type,
         URIRef("urn:example:Person"),
     ) in parsed
+
+
+def test_turtle_expands_context_prefixes_and_normalizes_malformed_iris():
+    """Prefixes expand and malformed URI-like values are minted."""
+    turtle = RDFExporter().export_to_rdf(
+        {
+            "@context": {"ex": "https://example.org/"},
+            "entities": [{"id": "http://[invalid", "type": "ex:Person"}],
+            "relationships": [],
+        },
+        format="turtle",
+    )
+    parsed = Graph().parse(data=turtle, format="turtle")
+
+    assert (
+        URIRef("https://semantica.dev/ns#http%3A%2F%2F%5Binvalid"),
+        RDF.type,
+        URIRef("https://example.org/Person"),
+    ) in parsed