diff --git a/doc/materials/groups/MATGROUP_SOLID b/doc/materials/groups/MATGROUP_SOLID
new file mode 100644
index 0000000..3c01ddb
--- /dev/null
+++ b/doc/materials/groups/MATGROUP_SOLID
@@ -0,0 +1,5 @@
+Gruppenid:
+MATGROUP_SOLID
+
+Name:
+feste Materialien