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sshade:databases:doccd:samples [2017/11/25 10:00] – Bernard Schmitt | sshade:databases:doccd:samples [2019/08/26 08:24] (current) – Harald Mutschke | ||
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+ | ===== DOCCD Samples and Spectra ===== | ||
+ | |||
+ | We provide **optical constants** of astrophysically relevant solid materials (silicates, oxides, carbonaceous, | ||
+ | derived from transmission and/or reflection spectra of polished bulk samples (natural, commercial, synthetic) | ||
+ | measured over various spectral ranges. In several cases, spectra measured on different samples (of the same material) | ||
+ | and with different instruments are combined in order to derive data covering a large wavelength range. | ||
+ | In case of crystalline materials, data for different polarization directions are often given. | ||
+ | Data for low (and sometimes high) temperatures are also available. | ||
+ | |||
+ | Data entered so far include the following materials: | ||
+ | * Mg-Fe silicate and Al-containing silicate glasses produced by melting and quenching (room temperature, | ||
+ | * Mg silicate glasses of different stoichiometry produced by the sol-gel method (room temperature, | ||
+ | * Fe(II)- and Fe(II)-Mg oxides of different Fe/Mg ratios (room temperature, | ||
+ | * Carbonaceous material produced by pyrolysis of cellulose (room temperature, | ||
+ | * Carbonaceous nanoparticles condensed in Ar/H2 atmosphere (isolated in Ar matrix at 14 K, UV/visible) | ||
+ | * Quartz, sapphire, and spinel (monocrystalline, | ||