{
  "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"]
    }
  }
}