{
	"NbN": 8.47,
	"Bi2Se3": 7.51,
	"La2CuO4": 7.08,
	"La1.84Sr0.16CuO4": 6.94,
	"N2": 1.145,
	"ZnO": 5.61,
	"ZnSe": 5.26,
	"ZnS": 4.09,
	"ZrO": 6.0,
	"Gd3Ga5O12": 7.08,
	"MgAl2O4": 3.6,
	"NdGaO3": 7.57,
	"YAlO3": 4.88,
	"Y3Al5O12": 4.55,
	"LiF": 2.6,
	"CaF2": 3.18,
	"BaFe": 4.83,
	"MgF2": 3.18,
	"SiO2": 2.65,
	"TiO2": 4.26,
	"KTaO3": 6.967,
	"LaAlO3": 6.7,
	"Al2O3": 3.98,
	"SrTiO3": 5.12,
	"SrLaGaO4": 6.389,
	"SrLaAlO4": 5.924,
	"NbSe2": 6.3,
	"MgO": 3.58,
	"YBa2Cu3O7": 6.54,
	"GaAs": 5.32,
	"C60": 1.65
}