diff --git a/geometry/materials.i b/geometry/materials.i
index ee7e665..a5fc9f0 100644
--- a/geometry/materials.i
+++ b/geometry/materials.i
@@ -120,9 +120,10 @@ mx18:h j 6012.70h j j j j j j j j
 mt18   poly.01t
 c
 c Cadmium density=8.65 g/cm3
-m19   48106.80c 0.012450   48108.80c 0.008880   48110.80c 0.124700
-      48111.80c 0.127950   48112.80c 0.241090   48113.80c 0.122270
-      48114.80c 0.287540   48116.80c 0.075120  
+m19   48000.42c  1.0
+c 48106.80c 0.012450   48108.80c 0.008880   48110.80c 0.124700
+c      48111.80c 0.127950   48112.80c 0.241090   48113.80c 0.122270
+c      48114.80c 0.287540   48116.80c 0.075120  
 c B4C sintered (2.3 g/cc)
 m20     5010.70c  -0.1841 5011.70c -0.74345 8016.70c -0.07245
 c