With a two-crystal vacuum spectrometer equipped with beryl crystals, t
he Cu Lalpha emission spectra in fluorescence have been measured for s
elected copper compounds Cu2O, CuO, CuCl, CuBr, Cul, CuF2, CuCl2, CuBr
2, CuF2.2H2O, CuCl2.2H2O and Cu3P, and alloys alpha-Cu+35%Zn and Cu+2%
Be. The measured spectra are grouped into three classes. The first cla
ss comprises the spectra of alloys, which consist of a single broad ba
nd similar to that of Cu metal. The second class includes the spectra
of monovalent copper compounds, which are composed of a prominent peak
and its high- and low-energy structures. To the third class belong th
e spectra of divalent copper compounds, which consist of a strong peak
accompanied with a characteristic dip and hump on the high-energy sid
e. The Cu Lalpha emission bands of Cu2O, CuCl and CuBr are compared wi
th available XPS spectra and theoretical Cu-3d-DOS.