A spontaneous and reversible single-crystal-to-single-crystal (SCSC) polymorphic transition via a disordered state has been captured in a salt, riluzolium oxalate, with no categorical loss in the quality of the crystals. Variable-temperature powder X-ray diffraction (VTPXRD) experiments provide additional support for the observed SCSC transition. The conformational change, along with the more efficient packing at 100 K, is the driving force for the event.

中文翻译：

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在草酸利鲁唑鎓的自发且可逆的单晶至单晶相变中捕获亚稳态†

通过无序状态自发且可逆的单晶至单晶（SCSC）多晶型转变已被捕获在草酸利鲁唑鎓盐中，晶体质量没有明显的损失。可变温度粉末X射线衍射（VTPXRD）实验为观察到的SCSC转变提供了额外的支持。构象变化以及在100 K时更有效的填充是事件的驱动力。