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Empyrean is a powder diffractometer with Bragg-Brentano and Debye-Scherrer geometry for quantitative structure analysis of crystals in a form of powder. Its x-ray source is a Cu sealed x-ray tube, which can be used either with a beta filter (measurement of flat samples with CuKalpha doublet), with primary Johansson monochromator (measurement of flat samples with CuKalpha1 line), and with focussing mirror (measurement of samples in a capillary with CuKalpha doublet). The minimum amount of sample is about 0.1 g. Structure determination is possible for small molecules and inorganic compounds.