Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.35, T = 300 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.35, T = 200 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.35, T = 100 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.35, T = 10 K

Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50A, T = 300 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50A, T = 200 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50A, T = 100 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50A, T = 10 K

Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50B, T = 300 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50B, T = 200 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50B, T = 100 K Spectrum Glassy silicate grains (1-x)MgO-xSiO2, x=0.50, X50B, T = 10 K