maint: set orbital radius

tfrederiksen · tfrederiksen · commit b6e09ca60c37 · 2020-03-26T17:44:46.000+01:00
diff --git a/sisl/geom/nanotube.py b/sisl/geom/nanotube.py
@@ -20,7 +20,7 @@ def nanotube(bond, atom=None, chirality=(1, 1)):
        chirality of nanotube (n, m)
     """
     if atom is None:
-        atom = Atom[6]
+        atom = Atom(Z=6, R=bond * 1.01)
 
     # Correct the input...
     n, m = chirality
