Raji Edayathumangalam wrote:
(3) Inconclusive "no diffraction" situation, which could indicate a million things including the possibility that your cryoprotectant was sub-optimal for data collection done using flash cryocooled/flash frozen crystals in a stream of gaseous nitrogen.
But before throwing it in this category, be sure to take a wide-angle oscillation, as reciprocal space is sparsely populated with small unit cell crystals and you might miss spots altogether in a 1 degree oscillation. I like to take a 5-sec 180* oscillation which gives plenty of spots in a nice pattern for a salt crystal, and I suppose records enough spacings to positively identify the mineral if anyone cared to tak the time. eab
