diff --git a/bin/catima_calculator.cpp b/bin/catima_calculator.cpp
index fd66913..289f9ea 100644
--- a/bin/catima_calculator.cpp
+++ b/bin/catima_calculator.cpp
@@ -243,7 +243,9 @@ Material json_material(json &j){
             return m;
             }
         else{
-            return get_material(z);
+            Material m = get_material(z);
+            m.thickness(th);
+            return m;
             }
         
         }
diff --git a/docs/catima_calculator.md b/docs/catima_calculator.md
index 1bf8163..17551f9 100644
--- a/docs/catima_calculator.md
+++ b/docs/catima_calculator.md
@@ -72,8 +72,6 @@ not specified default will be used. The config keyword is expected to be one of
 "config":"atimav1.4"
 ```
 
-
-
 Example Files
 -------------------
 ```
@@ -133,3 +131,150 @@ Example Files
 }
 ```
 
+#### Compound material
+The predefined compound material can be used using the __Z__ field as an ID of the compound.
+The following are supported:
+```
+Plastics = 201,
+		 Air = 202,
+		 CH2 = 203,
+		 LH2 = 204,
+		 LD2 = 205,
+		 Water = 206,
+		 Diamond = 207,
+		 Glass = 208,
+		 ALMG3 = 209,
+		 ArCO2_30 = 210,
+		 CF4 = 211,
+		 Isobutane = 212,
+		 Kapton = 213,
+		 Mylar = 214,
+		 NaF = 215,
+		 P10 = 216,
+		 Polyolefin = 217,
+		 CmO2 = 218,
+		 Suprasil = 219,
+		 HAVAR = 220,
+		 Steel = 221,
+		 CO2 = 222,
+		 CH4 = 223,
+		 Methanol = 224,
+		 Acetone = 225,
+		 Acetylene = 226,
+		 Adenine = 227,
+		 Adipose_Tissue = 228,
+		 Alanine = 229,
+		 Bakelite = 230,
+		 AgBr = 231,
+		 AgCl = 232,
+		 AgI = 233,
+		 Al2O3 = 234,
+		 Amber = 235,
+		 Ammonia = 236,
+		 Aniline = 237,
+		 Anthracene = 238,
+		 A_150 = 239,
+		 B_100 = 240,
+		 BaF2 = 241,
+		 BaSO4 = 242,
+		 Benzene = 243,
+		 BeO = 244,
+		 BGO = 245,
+		 Blood = 246,
+		 Bone_Compact = 247,
+		 Bone_Cortical = 248,
+		 Brain_ICRP = 249,
+		 B4C = 250,
+		 BC400 = 251,
+		 nButanol = 252,
+		 C_552 = 253,
+		 CdTe = 254,
+		 CdWO4 = 255,
+		 CaCO3 = 256,
+		 CaF2 = 257,
+		 CaO = 258,
+		 CaWO4 = 259,
+		 CsF = 260,
+		 CsI = 261,
+		 CCl4 = 262,
+		 C2Cl4 = 263,
+		 Cellophane = 264,
+		 Chlorobenzene = 265,
+		 Chloroform = 266,
+		 Cyclohexane = 267,
+		 Concrete = 268,
+		 Diethyl_Ether = 269,
+		 Ethane = 270,
+		 Ethanol = 271,
+		 Ethylene = 272,
+		 Eye_lens = 273,
+		 Fe2O3 = 274,
+		 FeO = 275,
+		 Freon12 = 276,
+		 Freon12B2 = 277,
+		 Freon13 = 278,
+		 Freon13B1 = 279,
+		 Freon13I1 = 280,
+		 Gd2O2S = 281,
+		 GaAs = 282,
+		 Gel_Photo_Emulsion = 283,
+		 Glass_Pyrex = 284,
+		 Glass_Lead = 285,
+		 Glucose = 286,
+		 Glutamine = 287,
+		 Glycerol = 288,
+		 Guanine = 289,
+		 Gypsum = 290,
+		 nHeptane = 291,
+		 nHexane = 292,
+		 KI = 293,
+		 K2O = 294,
+		 LaBr3 = 295,
+		 LaOBr = 296,
+		 La2O2S = 297,
+		 Lung = 298,
+		 MgCO3 = 299,
+		 MgF2 = 300,
+		 MgO = 301,
+		 MS20_Tissue = 302,
+		 Muscle_skeletal = 303,
+		 Muscle_strained = 304,
+		 Muscle_sucrose = 305,
+		 Muscle_no_sucrose = 306,
+		 Na2CO3 = 307,
+		 NaI = 308,
+		 NaCl = 309,
+		 Na2O = 310,
+		 NaNO3 = 311,
+		 Naphthalene = 312,
+		 Nitrobenzene = 313,
+		 N2O = 314,
+		 Octane = 315,
+		 Paraffin = 316,
+		 nPentane = 317,
+		 PhotoEmulsion = 318,
+		 PuO2 = 319,
+		 Polyacrylonitrile = 320,
+		 Polycarbonate = 321,
+		 PMMA = 322,
+		 POM = 323,
+		 Polypropylene = 324,
+		 Polystyrene = 325,
+		 Propane = 326,
+		 nPropanol = 327,
+		 PVC = 328,
+		 Pyridine = 329,
+		 SiO2 = 330,
+		 Skin = 331,
+		 Sucrose = 332,
+		 Teflon = 333,
+		 TlCl = 334,
+		 Toluene = 335,
+		 Trichloroethylene = 336,
+		 WF6 = 337,
+		 UC2 = 338,
+		 UC = 339,
+		 UO2 = 340,
+		 Urea = 341,
+		 Valine = 342
+```