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We have continued our studies of the rare earth tris (thd)$\mathrm{<mrow\; data-mjx-texclass="ORD">\ast </mrow>}$ chelates by examining the low-temperature luminescence in various solvent media. We are able to make some preliminary assignments of metal site symmetry and to compare this work with other studies of rare earth $\beta$-diketone complexes. Solvent effects were also examined.