long-lived bonds. In this terminology, samples A and B are repulsive glasses and F-H are attractive glasses. Samples I–K must lie in the region where these two types of glass merge as they show characteristics of both types, with further evidence in the dynamics shown in section \[sec:DSF\]. The next sections, with results from light scattering, will give insights into the structure and dynamics of these glasses, and the nature of the re-entrant transition between them.

Static structure factor
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We measured the static SSFs of the samples whose symbols are circled in Fig. \[fig:phasediag\]. Note that samples C–E were measured as metastable fluids, i.e. before any crystal nucleation took place. Consider first the results for a sequence of samples (A–H) with $\phi\approx 0.6$, Fig. \[fig:sqLo\]. These samples span the re-entrant glass transition line where the crystallization behavior showed dramatic changes. However, no re-entrant behavior can be seen in the SSF. Instead, there are only gradual changes upon increasing the attractive interaction. These gradual changes have been predicted by theory [@glassMCT], and observed before in other experimental systems [@glassMicellar3].

The most obvious and most easily quantifiable changes are in the height and position of the main peak. Broadly speaking, and 