diff --git a/src/data/AlMg4.5Mn0.7.json b/src/data/AlMg4.5Mn0.7.json
index 128d5e3..439b707 100644
--- a/src/data/AlMg4.5Mn0.7.json
+++ b/src/data/AlMg4.5Mn0.7.json
@@ -36,7 +36,7 @@
   },
   "Thermodynamic Properties": {
     "Crystal": {
-      "alpha": [23.3, "m/µm/K"],
+      "alpha": [23.3, "µm/m/K"],
       "lambda": ["110-130", "W/m/K"],
       "cp": [900, "J/kg/K"]
     }
diff --git a/src/data/INFO.json b/src/data/INFO.json
index 138d413..85129d8 100644
--- a/src/data/INFO.json
+++ b/src/data/INFO.json
@@ -40,7 +40,8 @@
   "p_b(T)": "Vapor pressure \\(p\\) in pascals: \\[\\log(p/Pa) = 5.006 + A + BT^{-1} + C\\log{T} + DT^3\\] where temperature T in K; p. 6-72",
   "Electromagnetic Data": {
     "chi_m": "Magnetic susceptibility; Molar susceptibility \\[\\chi\\ti{m} = \\kappa V\\ti{m} = \\kappa M / \\rho \\] where \\(\\kappa\\) is the volume susceptibility, \\(V\\ti{m}\\) is the molar volume of the substance, \\(M\\) the molar mass, and \\(\\rho\\) the mass density. \\(\\kappa = \\bold{M}/\\bold{H}\\) where \\(\\bold{H}\\) is the magnetic filed and \\(\\bold{M}\\) is magnetic moment per unit volume.",
-    "sigma": "Electrical conductivity σ"
+    "sigma": "Electrical conductivity σ",
+    "epsilon_r": "Relative permittivity (aka dielectric constant), default values at 18 °C and 50 Hz"
   },
   "Mechanical Properties": {
     "T": "Reference temperature",
@@ -56,6 +57,7 @@
       "R_p10": "load corresponding to a no proportional charge equal to a 1% of length L_0"
     },
     "R_m": "Ultimate tensile strength; it is the ratio between the maximum applied force and the original cross-sectional area of the specimen",
+    "R_m'": "Compressive strength, resistance to pressure",
     "Elongation": {
       "A": "permanent elongation of length L_0, expressed in per cent of length L_0",
       "A_0": "permanent elongation for proportional specimens with length L_0 equal to 100 mm  (used for diameter lower than 4 mm)",
@@ -72,7 +74,8 @@
     "Anodising": {
       "AH": "Hard anodising rating",
       "ASA": "Sulphuric acid (Decorative Type II) anodising rating"
-    }
+    },
+    "Annotation": "Annotation"
   },
   "Heat treatment": {
     "Hardening": "Precipitation hardening or age hardening or particle hardening",
diff --git a/src/data/Mg.json b/src/data/Mg.json
new file mode 100755
index 0000000..5fcc706
--- /dev/null
+++ b/src/data/Mg.json
@@ -0,0 +1,21 @@
+{
+  "Name": "Magnesium",
+  "Formula": "Mg",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [1738, "kg/m³"],
+    "E": [45, "GPa"],
+    "G": [17, "GPa"],
+    "K": [45, "GPa"],
+    "nu": 0.29,
+    "Hardness": {
+      "HM": 2.5,
+      "HB": [260, "MPa"]
+    }
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "lambda": [156, "W/m/K"]
+    }
+  }
+}
diff --git a/src/data/PA.json b/src/data/PA.json
new file mode 100755
index 0000000..d1b38ee
--- /dev/null
+++ b/src/data/PA.json
@@ -0,0 +1,15 @@
+{
+  "Name": "Polyamide",
+  "Formula": "PA",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [1140, "kg/m³"],
+    "E": [3, "GPa"],
+    "R_m": [2.3, "MPa"]
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "lambda": [0.25, "W/m/K"]
+    }
+  }
+}
diff --git a/src/data/Si.json b/src/data/Si.json
new file mode 100755
index 0000000..5989e00
--- /dev/null
+++ b/src/data/Si.json
@@ -0,0 +1,18 @@
+{
+  "Name": "Silicon",
+  "Name_de": "Silicium, Silizium",
+  "Formula": "Si",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [2329, "kg/m³"],
+    "E": ["159±29", "GPa"],
+    "G": ["65.5±14.5", "GPa"],
+    "K": [97.6, "GPa"],
+    "nu": "0.172±0.108"
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "lambda": [149, "W/m/K"]
+    }
+  }
+}
diff --git a/src/data/SiO2-Al2O3-MgO-K2O-Na2O-F.json b/src/data/SiO2-Al2O3-MgO-K2O-Na2O-F.json
new file mode 100755
index 0000000..1224cb6
--- /dev/null
+++ b/src/data/SiO2-Al2O3-MgO-K2O-Na2O-F.json
@@ -0,0 +1,26 @@
+{
+  "Name": "VITRONIT",
+  "Formula": "SiO2-Al2O3-MgO-K2O-Na2O-F",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [2660, "kg/m³"],
+    "E": [74.5, "GPa"],
+    "G": [29, "GPa"],
+    "nu": 0.24,
+    "R_m'": [450, "MPa"],
+    "Annotation": "Similar to Macor"
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "alpha": ["10.4±0.9", "µm/m/K"],
+      "lambda": [1.72, "W/m/K"],
+      "cp": [789, "J/kg/K"]
+    }
+  },
+  "Source": [
+    {
+      "Type": "Web",
+      "URL": "http://www.vitron.de/spanend-bearbeitbare-Keramik/Daten-Glaskeramik.php"
+    }
+  ]
+}
diff --git a/src/data/SiO2-B2O3.json b/src/data/SiO2-B2O3.json
new file mode 100755
index 0000000..77f6c14
--- /dev/null
+++ b/src/data/SiO2-B2O3.json
@@ -0,0 +1,24 @@
+{
+  "Name": "BOROFLOAT® 33, Borosilicate glass",
+  "Formula": "SiO2-B2O3",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [2230, "kg/m³"],
+    "E": [64, "GPa"],
+    "nu": 0.2,
+    "R_m": [25, "MPa"],
+    "Annotation": "T_Max<10h = 500 °C; T_Max>=10h = 450 °C"
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "alpha": [3.25, "µm/m/K"],
+      "lambda": [1.2, "W/m/K"]
+    }
+  },
+  "Source": [
+    {
+      "Type": "Web",
+      "URL": "http://www.us.schott.com/borofloat/english/attribute/mechanical/index.html"
+    }
+  ]
+}
diff --git a/src/data/SiO2-MgO-Al2O3-K20-B2O3-F.json b/src/data/SiO2-MgO-Al2O3-K20-B2O3-F.json
new file mode 100755
index 0000000..f7ce745
--- /dev/null
+++ b/src/data/SiO2-MgO-Al2O3-K20-B2O3-F.json
@@ -0,0 +1,17 @@
+{
+  "Name": "Macor",
+  "Formula": "SiO2-MgO-Al2O3-K2O-B2O3-F",
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [2520, "kg/m³"],
+    "E": [66.9, "GPa"],
+    "nu": 0.29,
+    "R_m'": [350, "MPa"]
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "alpha": [9.3, "µm/m/K"],
+      "lambda": [1.46, "W/m/K"]
+    }
+  }
+}
diff --git a/src/data/SiO2.json b/src/data/SiO2.json
new file mode 100755
index 0000000..d791a15
--- /dev/null
+++ b/src/data/SiO2.json
@@ -0,0 +1,28 @@
+{
+  "Name": "Fused quartz",
+  "Name_de": "Quarzglas",
+  "Formula": "SiO2",
+  "Electromagnetic Data": {
+    "epsilon_r": ["7±1", "F/m"]
+  },
+  "Mechanical Properties": {
+    "T": ["20-25", "°C"],
+    "rho": [2203, "kg/m³"],
+    "E": [71.4, "GPa"],
+    "G": [31.26, "GPa"],
+    "K": [37, "GPa"],
+    "nu": 0.17,
+    "R_m": [48.3, "MPa"],
+    "R_m'": [">1100", "MPa"],
+    "Hardness": {
+      "HM": "5.9±0.6"
+    }
+  },
+  "Thermodynamic Properties": {
+    "Crystal": {
+      "alpha": [0.55, "µm/m/K"],
+      "lambda": [1.3, "W/m/K"],
+      "cp": [830, "J/kg/K"]
+    }
+  }
+}
diff --git a/src/data/example.json b/src/data/example.json
index 5f7f8e8..8499d4f 100644
--- a/src/data/example.json
+++ b/src/data/example.json
@@ -17,7 +17,8 @@
   },
   "Electromagnetic Data": {
     "chi_m": [16.5e-6, "cm³/mol"],
-    "sigma": ["16-18", "m/Ω/mm²"]
+    "sigma": ["16-18", "m/Ω/mm²"],
+    "epsilon_r": ["7±1", "F/m"]
   },
   "Mechanical Properties": {
     "T": ["20-25", "°C"],
@@ -30,23 +31,27 @@
       "R_p02": ["110-130", "MPa"]
     },
     "R_m": ["230-290", "MPa"],
+    "R_m'": [">1100", "MPa"],
     "Elongation": {
       "A_5": ["10-15", "%"]
     },
     "Hardness": {
+      "HM": 2.5,
+      "HB": [260, "MPa"],
       "HBW": ["68-75", "2.5/62.5"]
     },
     "Anodising": {
       "AH": 2,
       "ASA": 4
-    }
+    },
+    "Annotation": "T_Max<10h = 500 °C; T_Max>=10h = 450 °C"
   },
   "Heat treatment": {
     "Temper": "homogenized and stress relieved, O3"
   },
   "Thermodynamic Properties": {
     "Crystal": {
-      "alpha": [23.3, "m/µm/K"],
+      "alpha": [23.3, "µm/m/K"],
       "lambda": ["110-130", "W/m/K"],
       "cp": [900, "J/kg/K"]
     }