We have experienced the bulk crystal growth of InSb / GaSb and its doped crystal by the novel technique such as vertical directional solidification (VDS) has shown detached bulk crystal growth in our laboratory. However, detached bulk crystal had observed in NASA Space Mission III-V microgravity experiments in 1994. Present study has been carried in International Space Station (ISS).
What I can tell you about (and that is well known) are the differences between crystal growth in space and on earth. In space (such as on the ISS) the gravity is reduced, with all that implies (discussed in several publications, such as effects on convection). There are additional factors: vibrations and motions during take-off until reaching the orbit; similar effects during re-entry (normally the crystals should have grown at that stage).
The latest I had heard (but I don't follow this topic on a regular basis) is that from a statistical point of view there was no or not much difference between space-grown and earth-grown crystals. I might be wrong on that because I do not follow this topic much and therefore I may have missed important (recent) papers.
Frederic is correct. The main point of difference is that there should be minimal convective effects in a microgravity environment. If you mean 'detached crystal growth' as in 'fragmentation' of then convection is normally seen to promote conditions for fragmentation. Hope this helps.
I can add to above conciderations the following factors.1 In microgravity Marangoni convection might control crystal microstructure in the case of detached growth. The effect of this type of convection depends on the extention of free surface and temperature gradient along this surface. 2. vibrational convection might play essential role in solidification pattern formation dependently on geometry of the sample and parameters of low-friquecy vibration (g-gitter) Both effects might be more significant then gravitational convection in ground conditions.