diff --git a/examples/xml/c5g7/2d/cmfd.xml b/examples/xml/c5g7/2d/cmfd.xml
deleted file mode 100644
index 8e8d77490c..0000000000
--- a/examples/xml/c5g7/2d/cmfd.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0"?>
-
-<cmfd>
-  <begin>10</begin>
-  <feedback>true</feedback>
-  <mesh>
-    <lower_left> 0.0 0.0 -100.0</lower_left>
-    <upper_right> 64.26 64.26 100.0</upper_right>
-    <dimension>6 6 1</dimension>
-    <albedo>1 0 0 1 1 1</albedo>
-  </mesh>
-</cmfd>
diff --git a/examples/xml/c5g7/2d/geometry.xml b/examples/xml/c5g7/2d/geometry.xml
deleted file mode 100644
index 3b43562f37..0000000000
--- a/examples/xml/c5g7/2d/geometry.xml
+++ /dev/null
@@ -1,118 +0,0 @@
-<geometry>
-
-
-
-  <surface coeffs="0. 0. 0.540" id="1" type="z-cylinder" />
-
-
-  <surface boundary="reflective" coeffs="   0.0" id="20" type="x-plane" />
-  <surface boundary="vacuum"     coeffs=" 64.26" id="21" type="x-plane" />
-  <surface boundary="vacuum"     coeffs="   0.0" id="22" type="y-plane" />
-  <surface boundary="reflective" coeffs=" 64.26" id="23" type="y-plane" />
-  <surface boundary="reflective" coeffs="-100.0" id="35" type="z-plane" />
-  <surface boundary="reflective" coeffs=" 100.0" id="36" type="z-plane" />
-
-
-  <cell id="10" material="1" region="-1" universe="1" />
-  <cell id="11" material="7" region=" 1" universe="1" />
-
-
-  <cell id="20" material="2" region="-1" universe="2" />
-  <cell id="21" material="7" region=" 1" universe="2" />
-
-
-  <cell id="30" material="3" region="-1" universe="3" />
-  <cell id="31" material="7" region=" 1" universe="3" />
-
-
-  <cell id="40" material="4" region="-1" universe="4" />
-  <cell id="41" material="7" region=" 1" universe="4" />
-
-
-  <cell id="50" material="5" region="-1" universe="5" />
-  <cell id="51" material="7" region=" 1" universe="5" />
-
-
-  <cell id="60" material="6" region="-1" universe="6" />
-  <cell id="61" material="7" region=" 1" universe="6" />
-
-
-  <lattice id="100">
-    <outer>0</outer>
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 6 1 1 6 1 1 6 1 1 1 1 1
-      1 1 1 6 1 1 1 1 1 1 1 1 1 6 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 6 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 5 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 6 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 6 1 1 1 1 1 1 1 1 1 6 1 1 1
-      1 1 1 1 1 6 1 1 6 1 1 6 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-
-  <lattice id="101">
-    <outer>0</outer>
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
-      2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
-      2 3 3 3 3 6 3 3 6 3 3 6 3 3 3 3 2
-      2 3 3 6 3 4 4 4 4 4 4 4 3 6 3 3 2
-      2 3 3 3 4 4 4 4 4 4 4 4 4 3 3 3 2
-      2 3 6 4 4 6 4 4 6 4 4 6 4 4 6 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 6 4 4 6 4 4 5 4 4 6 4 4 6 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 6 4 4 6 4 4 6 4 4 6 4 4 6 3 2
-      2 3 3 3 4 4 4 4 4 4 4 4 4 3 3 3 2
-      2 3 3 6 3 4 4 4 4 4 4 4 3 6 3 3 2
-      2 3 3 3 3 6 3 3 6 3 3 6 3 3 3 3 2
-      2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
-      2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
-    </universes>
-  </lattice>
-
-
-  <cell id="112" material="7" region="35 -36" universe="12" />
-
-
-  <cell fill="100" id="110" region="35 -36" universe="10" />
-
-
-  <cell fill="101" id="111" region="35 -36" universe="11" />
-
-
-  <lattice id="200">
-    <outer>0</outer>
-    <dimension>3 3</dimension>
-    <lower_left>0.0 0.0</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      10 11 12
-      11 10 12
-      12 12 12
-    </universes>
-  </lattice>
-
-
-  <cell fill="200" id="1" region=" 20 -21 22 -23 35 -36" />
-
-</geometry>
diff --git a/examples/xml/c5g7/2d/materials.xml b/examples/xml/c5g7/2d/materials.xml
deleted file mode 120000
index c3825cffc5..0000000000
--- a/examples/xml/c5g7/2d/materials.xml
+++ /dev/null
@@ -1 +0,0 @@
-/home/nelsonag/cases/c5g7/materials.xml
\ No newline at end of file
diff --git a/examples/xml/c5g7/2d/plots.xml b/examples/xml/c5g7/2d/plots.xml
deleted file mode 100644
index a38f73f4e3..0000000000
--- a/examples/xml/c5g7/2d/plots.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0"?>
-<plots>
-
-<plot>
-  <id>1</id>
-  <filename>mat</filename>
-  <color>material</color>
-  <origin>32.13 32.13 0</origin>
-  <width>64.26 64.26</width>
-  <type>slice</type>
-  <pixels>1000 1000 </pixels>
-  <!-- <col_spec id="1" rgb="255 0   0" />
-  <col_spec id="2" rgb="0   0   0" />
-  <col_spec id="3" rgb="0   255 0" />
-  <col_spec id="4" rgb="0   0   255" />
--->
-</plot>
-
-<plot>
-  <id>2</id>
-  <filename>cell</filename>
-  <color>cell</color>
-  <origin>32.13 32.13 0</origin>
-  <width>64.26 64.26</width>
-  <type>slice</type>
-  <pixels>1000 1000 </pixels>
-</plot>
-
-</plots>
diff --git a/examples/xml/c5g7/2d/settings.xml b/examples/xml/c5g7/2d/settings.xml
deleted file mode 100644
index 038c80c303..0000000000
--- a/examples/xml/c5g7/2d/settings.xml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-  <energy_mode>multi-group</energy_mode>
-  <!--
-    Define how many particles to run and for how many batches
-    in an eigenvalue calculation mode
-  -->
-  <eigenvalue>
-    <batches>2000</batches>
-    <inactive>500</inactive>
-    <particles>10000</particles>
-  </eigenvalue>
-
-  <!--
-    Start with uniformally distributed neutron source
-    with the default energy spectrum of a Maxwellian
-    and isotropic distribution.
-  -->
-  <source>
-    <space type="box">
-      <parameters>
-         0.0  21.42 -100
-        42.84 64.26  100
-      </parameters>
-    </space>
-  </source>
-
-  <!-- Establish statepoints to aid in examining convergence -->
-  <state_point>
-    <interval> 2000 </interval>
-    <source_write>true</source_write>
-  </state_point>
-
-  <output>
-    <cross_sections>true</cross_sections>
-    <summary>true</summary>
-    <tallies>true</tallies>
-  </output>
-
-  <run_cmfd>true</run_cmfd>
-
-  <cross_sections>../data.xml</cross_sections>
-
-</settings>
diff --git a/examples/xml/c5g7/2d/tallies.xml b/examples/xml/c5g7/2d/tallies.xml
deleted file mode 100644
index 8b21bf524a..0000000000
--- a/examples/xml/c5g7/2d/tallies.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="mesh" bins="1" />
-    <filter type="energy" />
-    <scores>flux</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="mesh" bins="1"/>
-    <scores>fission</scores>
-  </tally>
-
-  <mesh>
-    <id>1</id>
-    <type>regular</type>
-    <lower_left> 0.0 0.0 -100.0 </lower_left>
-    <upper_right> 64.26 64.26 100.0 </upper_right>
-    <dimension> 51 51 1 </dimension>
-  </mesh>
-
-  <assume_separate>false</assume_separate>
-
-</tallies>
diff --git a/examples/xml/c5g7/3d/geometry.xml b/examples/xml/c5g7/3d/geometry.xml
deleted file mode 100644
index b7766b32a0..0000000000
--- a/examples/xml/c5g7/3d/geometry.xml
+++ /dev/null
@@ -1,138 +0,0 @@
-<geometry>
-
-
-
-  <surface coeffs="0. 0. 0.540" id="1" type="z-cylinder" />
-
-
-  <surface boundary="reflective" coeffs="   0.0" id="20" type="x-plane" />
-  <surface boundary="vacuum" coeffs=" 64.26" id="21" type="x-plane" />
-  <surface boundary="vacuum" coeffs="   0.0" id="22" type="y-plane" />
-  <surface boundary="reflective" coeffs=" 64.26" id="23" type="y-plane" />
-  <surface boundary="reflective" coeffs="   0.0" id="30" type="z-plane" />
-  <surface coeffs="192.78" id="31" type="z-plane" />
-  <surface boundary="vacuum" coeffs=" 214.2" id="32" type="z-plane" />
-
-
-  <cell id="10" material="1" region="-1" universe="1" />
-  <cell id="11" material="7" region=" 1" universe="1" />
-
-
-  <cell id="20" material="2" region="-1" universe="2" />
-  <cell id="21" material="7" region=" 1" universe="2" />
-
-
-  <cell id="30" material="3" region="-1" universe="3" />
-  <cell id="31" material="7" region=" 1" universe="3" />
-
-
-  <cell id="40" material="4" region="-1" universe="4" />
-  <cell id="41" material="7" region=" 1" universe="4" />
-
-
-  <cell id="50" material="5" region="-1" universe="5" />
-  <cell id="51" material="7" region=" 1" universe="5" />
-
-
-  <cell id="60" material="6" region="-1" universe="6" />
-  <cell id="61" material="7" region=" 1" universe="6" />
-
-
-  <lattice id="100">
-    <outer>0</outer>
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 6 1 1 6 1 1 6 1 1 1 1 1
-      1 1 1 6 1 1 1 1 1 1 1 1 1 6 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 6 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 5 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 6 1 1 6 1 1 6 1 1 6 1 1 6 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 6 1 1 1 1 1 1 1 1 1 6 1 1 1
-      1 1 1 1 1 6 1 1 6 1 1 6 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-      1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-    </universes>
-  </lattice>
-
-
-  <lattice id="101">
-    <outer>0</outer>
-    <dimension>17 17</dimension>
-    <lower_left>-10.71 -10.71</lower_left>
-    <pitch>1.26 1.26</pitch>
-    <universes>
-      2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
-      2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
-      2 3 3 3 3 6 3 3 6 3 3 6 3 3 3 3 2
-      2 3 3 6 3 4 4 4 4 4 4 4 3 6 3 3 2
-      2 3 3 3 4 4 4 4 4 4 4 4 4 3 3 3 2
-      2 3 6 4 4 6 4 4 6 4 4 6 4 4 6 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 6 4 4 6 4 4 5 4 4 6 4 4 6 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 3 4 4 4 4 4 4 4 4 4 4 4 3 3 2
-      2 3 6 4 4 6 4 4 6 4 4 6 4 4 6 3 2
-      2 3 3 3 4 4 4 4 4 4 4 4 4 3 3 3 2
-      2 3 3 6 3 4 4 4 4 4 4 4 3 6 3 3 2
-      2 3 3 3 3 6 3 3 6 3 3 6 3 3 3 3 2
-      2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
-      2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
-    </universes>
-  </lattice>
-
-
-  <cell id="112" material="7" region="30 -31" universe="12" />
-
-
-  <cell fill="100" id="110" region="30 -31" universe="10" />
-
-
-  <cell fill="101" id="111" region="30 -31" universe="11" />
-
-
-  <lattice id="200" outer="199">
-    
-    <dimension>3 3</dimension>
-    <lower_left>0.0 0.0</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      10 11 12
-      11 10 12
-      12 12 12
-    </universes>
-  </lattice>
-
-  <cell fill="200" id="1" region=" 20 -21 22 -23 30 -31" />
-
-  
-
-  <cell id="113" material="7" region="31 -32" universe="13" />
-
-  <lattice id="201" outer="202">
-    
-    <dimension>3 3</dimension>
-    <lower_left>0.0 0.0</lower_left>
-    <pitch>21.42 21.42</pitch>
-    <universes>
-      13 13 13
-      13 13 13
-      13 13 13
-    </universes>
-  </lattice>
-
-  <cell fill="201" id="2" region=" 20 -21 22 -23 31 -32" />
-
-
-
-<cell id="199" material="void" universe="199" /><cell id="202" material="void" universe="202" /></geometry>
\ No newline at end of file
diff --git a/examples/xml/c5g7/3d/materials.xml b/examples/xml/c5g7/3d/materials.xml
deleted file mode 120000
index c344223b66..0000000000
--- a/examples/xml/c5g7/3d/materials.xml
+++ /dev/null
@@ -1 +0,0 @@
-../materials.xml
\ No newline at end of file
diff --git a/examples/xml/c5g7/3d/plots.xml b/examples/xml/c5g7/3d/plots.xml
deleted file mode 100644
index caab977866..0000000000
--- a/examples/xml/c5g7/3d/plots.xml
+++ /dev/null
@@ -1,42 +0,0 @@
-<?xml version="1.0"?>
-<plots>
-
-<plot>
-  <id>1</id>
-  <filename>mat</filename>
-  <color>material</color>
-  <origin>32.13 32.13 107.1</origin>
-  <width>64.26 214.2</width>
-  <type>slice</type>
-  <pixels>1000 1000 </pixels>
-  <!-- <col_spec id="1" rgb="255 0   0" />
-  <col_spec id="2" rgb="0   0   0" />
-  <col_spec id="3" rgb="0   255 0" />
-  <col_spec id="4" rgb="0   0   255" />
--->
-  <basis>xz</basis>
-</plot>
-
-<plot>
-  <id>2</id>
-  <filename>cell</filename>
-  <color>cell</color>
-  <origin>32.13 32.13 107.1</origin>
-  <width>64.26 214.2</width>
-  <type>slice</type>
-  <pixels>1000 1000 </pixels>
-  <basis>xz</basis>
-</plot>
-
-<plot>
-  <id>3</id>
-  <filename>mat_xy</filename>
-  <color>material</color>
-  <origin>32.13 32.13 107.1</origin>
-  <width>64.26 64.26</width>
-  <type>slice</type>
-  <pixels>1000 1000 </pixels>
-  <basis>xy</basis>
-</plot>
-
-</plots>
diff --git a/examples/xml/c5g7/3d/settings.xml b/examples/xml/c5g7/3d/settings.xml
deleted file mode 100644
index 51241492d5..0000000000
--- a/examples/xml/c5g7/3d/settings.xml
+++ /dev/null
@@ -1,47 +0,0 @@
-<?xml version="1.0"?>
-<settings>
-  <energy_mode>multi-group</energy_mode>
-  <!--
-    Define how many particles to run and for how many batches
-    in an eigenvalue calculation mode
-  -->
-  <eigenvalue>
-    <batches>2000</batches>
-    <inactive>500</inactive>
-    <particles>1000</particles>
-  </eigenvalue>
-
-  <uniform_fs>
-    <lower_left> 0.0 21.42 0.0 </lower_left>
-    <upper_right> 42.84 64.26 192.78 </upper_right>
-    <dimension> 34 34 54 </dimension>
-  </uniform_fs>
-
-  <!--
-    Start with uniformally distributed neutron source
-    with the default energy spectrum of a Maxwellian
-    and isotropic distribution.
-  -->
-  <source>
-    <space type="box">
-      <parameters>
-         0.0  21.42 0.0
-        42.84 64.26 192.78
-      </parameters>
-    </space>
-  </source>
-
-  <!-- Establish statepoints -->
-  <state_point>
-    <interval>2000</interval>
-  </state_point>
-
-  <output>
-    <cross_sections>true</cross_sections>
-    <summary>true</summary>
-    <tallies>true</tallies>
-  </output>
-
-  <cross_sections>../data.xml</cross_sections>
-
-</settings>
diff --git a/examples/xml/c5g7/3d/tallies.xml b/examples/xml/c5g7/3d/tallies.xml
deleted file mode 100644
index e3826ccb63..0000000000
--- a/examples/xml/c5g7/3d/tallies.xml
+++ /dev/null
@@ -1,33 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="mesh" bins="1" />
-    <filter type="energy" />
-    <scores>flux</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="mesh" bins="2"/>
-    <scores>fission</scores>
-  </tally>
-
-  <mesh>
-    <id>1</id>
-    <type>rectangular</type>
-    <lower_left> 0.0 0.0 0.0 </lower_left>
-    <upper_right> 64.26 64.26 214.2 </upper_right>
-    <dimension> 51 51 60 </dimension>
-  </mesh>
-
-  <mesh>
-    <id>2</id>
-    <type>rectangular</type>
-    <lower_left>   0.0  21.42 0.0 </lower_left>
-    <upper_right> 42.84 64.26 192.78 </upper_right>
-    <dimension> 34 34 54 </dimension>
-  </mesh>
-
-  <assume_separate>false</assume_separate>
-
-</tallies>
diff --git a/examples/xml/c5g7/pin/materials.xml b/examples/xml/c5g7/pin/materials.xml
deleted file mode 120000
index c3825cffc5..0000000000
--- a/examples/xml/c5g7/pin/materials.xml
+++ /dev/null
@@ -1 +0,0 @@
-/home/nelsonag/cases/c5g7/materials.xml
\ No newline at end of file
diff --git a/examples/xml/c5g7/pin/tallies.xml b/examples/xml/c5g7/pin/tallies.xml
deleted file mode 100644
index 727584a627..0000000000
--- a/examples/xml/c5g7/pin/tallies.xml
+++ /dev/null
@@ -1,16 +0,0 @@
-<?xml version="1.0"?>
-<tallies>
-
-  <tally id="1">
-    <filter type="cell" bins="1 2" />
-    <filter type="energy" />
-    <scores>flux</scores>
-  </tally>
-
-  <tally id="2">
-    <filter type="energy" />
-    <filter type="energyout" />
-    <scores>scatter</scores>
-  </tally>
-
-</tallies>
diff --git a/examples/xml/c5g7/pin/geometry.xml b/examples/xml/pincell_multigroup/geometry.xml
similarity index 100%
rename from examples/xml/c5g7/pin/geometry.xml
rename to examples/xml/pincell_multigroup/geometry.xml
diff --git a/examples/xml/c5g7/materials.xml b/examples/xml/pincell_multigroup/materials.xml
similarity index 100%
rename from examples/xml/c5g7/materials.xml
rename to examples/xml/pincell_multigroup/materials.xml
diff --git a/examples/xml/c5g7/data.xml b/examples/xml/pincell_multigroup/mg_cross_sections.xml
similarity index 100%
rename from examples/xml/c5g7/data.xml
rename to examples/xml/pincell_multigroup/mg_cross_sections.xml
diff --git a/examples/xml/c5g7/pin/plots.xml b/examples/xml/pincell_multigroup/plots.xml
similarity index 100%
rename from examples/xml/c5g7/pin/plots.xml
rename to examples/xml/pincell_multigroup/plots.xml
diff --git a/examples/xml/c5g7/pin/settings.xml b/examples/xml/pincell_multigroup/settings.xml
similarity index 94%
rename from examples/xml/c5g7/pin/settings.xml
rename to examples/xml/pincell_multigroup/settings.xml
index b11c328e5a..6bd27df3dd 100644
--- a/examples/xml/c5g7/pin/settings.xml
+++ b/examples/xml/pincell_multigroup/settings.xml
@@ -41,6 +41,6 @@
 
   <survival_biasing>false</survival_biasing>
 
-  <cross_sections>../data.xml</cross_sections>
+  <cross_sections>./mg_cross_sections.xml</cross_sections>
 
 </settings>
diff --git a/examples/xml/pincell_multigroup/tallies.xml b/examples/xml/pincell_multigroup/tallies.xml
new file mode 100644
index 0000000000..ed9763be52
--- /dev/null
+++ b/examples/xml/pincell_multigroup/tallies.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<tallies>
+    <mesh id="1" type="regular">
+        <dimension>100 100 1</dimension>
+        <lower_left>-0.63 -0.63 -1e+50</lower_left>
+        <upper_right>0.63 0.63 1e+50</upper_right>
+    </mesh>
+    <tally id="1" name="tally 1">
+        <filter type="energy" />
+        <filter bins="1" type="mesh" />
+        <scores>flux fission nu-fission</scores>
+    </tally>
+</tallies>
diff --git a/openmc/mgxs_library.py b/openmc/mgxs_library.py
index 282997983b..d1c1f4e05f 100644
--- a/openmc/mgxs_library.py
+++ b/openmc/mgxs_library.py
@@ -24,37 +24,49 @@ def ndarray_to_string(arr):
 
     shape = arr.shape
     ndim = arr.ndim
-    text = ''
+    tab = '    '
+    indent = '\n' + tab + tab
+    text = indent
 
     if ndim == 1:
-        text += ' '.join(map(str, arr[:]))
+        text += tab
+        for i in range(shape[0]):
+            text += '{:.7E} '.format(arr[i])
+        text += indent
     elif ndim == 2:
-        for i in xrange(shape[0]):
-            text += ' '.join(map(str, arr[i,:]))
-            text += '\n'
+        for i in range(shape[0]):
+            text += tab
+            for j in range(shape[1]):
+                text += '{:.7E} '.format(arr[i,j])
+            text += indent
     elif ndim == 3:
-        for i in xrange(shape[0]):
-            for j in xrange(shape[1]):
-                text += ' '.join(map(str, arr[i,j,:]))
-                text += '\n'
+        for i in range(shape[0]):
+            for j in range(shape[1]):
+                text += tab
+                for k in range(shape[2]):
+                    text += '{:.7E} '.format(arr[i,j,k])
+                text += indent
     elif ndim == 4:
-        for i in xrange(shape[0]):
-            for j in xrange(shape[1]):
-                for k in xrange(shape[2]):
-                    text += ' '.join(map(str, arr[i,j,k,:]))
-                    text += '\n'
+        for i in range(shape[0]):
+            for j in range(shape[1]):
+                for k in range(shape[2]):
+                    text += tab
+                    for l in range(shape[3]):
+                        text += '{:.7E} '.format(arr[i,j,k,l])
+                    text += indent
     elif ndim == 5:
-        for i in xrange(shape[0]):
-            for j in xrange(shape[1]):
-                for k in xrange(shape[2]):
-                    for l in xrange(shape[3]):
-                        text += ' '.join(map(str, arr[i,j,k,l,:]))
-                        text += '\n'
+        for i in range(shape[0]):
+            for j in range(shape[1]):
+                for k in range(shape[2]):
+                    for l in range(shape[3]):
+                        text += tab
+                        for m in range(shape[4]):
+                            text += '{:.7E} '.format(arr[i,j,k,l,m])
+                        text += indent
 
     return text
 
 
-
 class Xsdata(object):
     """A multi-group cross section data set (xsdata) providing all the
     multi-group data necessary for a multi-group OpenMC calculation.