diff --git a/code/material.config b/code/material.config
index b0d4bc5bd..25468af9c 100644
--- a/code/material.config
+++ b/code/material.config
@@ -299,54 +299,55 @@ relevantResistance      1
 
 [TWIP steel FeMnC]
 
-#(output)			edge_density
-#(output)			dipole_density
-#(output)			shear_rate_slip
-#(output)			mfp_slip
-#(output)			resolved_stress_slip
-#(output)			threshold_stress_slip
-#(output)			twin_fraction
-#(output)			shear_rate_twin
-#(output)			mfp_twin
-#(output)			resolved_stress_twin
-#(output)			threshold_stress_twin
+constitution        dislotwin
+
+#(output)           edge_density
+#(output)           dipole_density
+#(output)           shear_rate_slip
+#(output)           mfp_slip
+#(output)           resolved_stress_slip
+#(output)           threshold_stress_slip
+#(output)           twin_fraction
+#(output)           shear_rate_twin
+#(output)           mfp_twin
+#(output)           resolved_stress_twin
+#(output)           threshold_stress_twin
 
 ### Material parameters ###
 lattice_structure	fcc
-constitution		dislotwin
-C11					175.0e9			# From Music et al. Applied Physics Letters 91, 191904 (2007)
-C12					115.0e9
-C44					135.0e9
-grainsize			2.0e-5			# Average grain size [m]
+C11                 175.0e9         # From Music et al. Applied Physics Letters 91, 191904 (2007)
+C12                 115.0e9
+C44                 135.0e9
+grainsize           2.0e-5          # Average grain size [m]
 
-### Dislocation glide adjusting parameters ###
-Nslip				12 0 0 0
-slipburgers			2.56e-10 0 0 0	# Burgers vector of slip system [m]
-rhoedge0			1.0e12 0 0 0	# Initial dislocation density [m/m**3]
-rhoedgedip0			1.0 0 0 0		# Initial dislocation density [m/m**3]
-Qedge				3.7e-19 0 0 0	# Activation energy for dislocation glide [J]
-v0                	1.0e-4 0 0 0    # Initial glide velocity [m/s]
-CLambdaSlip			10.0 0 0 0		# Adj. parameter controlling dislocation mean free path
-D0					4.0e-5      	# Vacancy diffusion prefactor [m**2/s]
-Qsd					4.5e-19         # Activation energy for climb [J]
+### Dislocation glide parameters ###
+Nslip               12 0 0 0
+slipburgers         2.56e-10 0 0 0  # Burgers vector of slip system [m]
+rhoedge0            1.0e12 0 0 0    # Initial dislocation density [m/m**3]
+rhoedgedip0         1.0 0 0 0       # Initial dislocation density [m/m**3]
+Qedge               3.7e-19 0 0 0   # Activation energy for dislocation glide [J]
+v0                  1.0e-4 0 0 0    # Initial glide velocity [m/s]
+CLambdaSlip         10.0 0 0 0      # Adj. parameter controlling dislocation mean free path
+D0                  4.0e-5          # Vacancy diffusion prefactor [m**2/s]
+Qsd                 4.5e-19         # Activation energy for climb [J]
 pexponent           1.0             # p-exponent in glide velocity
 qexponent           1.0             # q-exponent in glide velocity
-Catomicvolume		1.0				# Adj. parameter controlling the atomic volume [in b]
-Cedgedipmindistance	1.0				# Adj. parameter controlling the minimum dipole distance [in b]
-relevantRho			1.0e-200
-interactionSlipSlip	0.122 0.122 0.625 0.07 0.137 0.122	# Interaction coefficients (Kubin et al. 2008)
+Catomicvolume       1.0             # Adj. parameter controlling the atomic volume [in b]
+Cedgedipmindistance 1.0             # Adj. parameter controlling the minimum dipole distance [in b]
+relevantRho         1.0e-200
+interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficients (Kubin et al. 2008)
 
-### dislocation density-based constitutive parameters ###
-Ntwin				12
-twinburgers			1.47e-10		# Burgers vector of twin system [m]
-twinsize			5.0e-8			# Twin stack mean thickness [m]	
-maxtwinfraction		1.0				# Maximum admissible twin volume fraction
-Ndot0				0.0				# Number of potential sources per volume per time [1/m**3.s] 
-rexponent			10.0			# r-exponent in glide velocity
-Cmfptwin			1.0				# Adj. parameter controlling twin mean free path
-Cthresholdtwin		1.0				# Adj. parameter controlling twin threshold stress
-interactionSlipTwin	0.0 1.0			# Dislocation interaction coefficients
-interactionTwinTwin	0.0 1.0			# Dislocation interaction coefficients
+### Twinning parameters ###
+Ntwin               12
+twinburgers         1.47e-10        # Burgers vector of twin system [m]
+twinsize            5.0e-8          # Twin stack mean thickness [m]	
+maxtwinfraction     1.0             # Maximum admissible twin volume fraction
+Ndot0               0.0             # Number of potential sources per volume per time [1/m**3.s] 
+rexponent           10.0            # r-exponent in twin formation probability
+Cmfptwin            1.0             # Adj. parameter controlling twin mean free path
+Cthresholdtwin      1.0             # Adj. parameter controlling twin threshold stress
+interactionSlipTwin 0.0 1.0         # Dislocation-Twin interaction coefficients
+interactionTwinTwin 0.0 1.0         # Twin-Twin interaction coefficients
 
 #-------------------#
 <texture>