A new sapphire capillary pressure cell for single‐crystal X‐ray diffraction measurements at moderate pressures (200−1500 bar; 1 bar = 100 kPa) has been developed and optimized for use on beamline I19 at Diamond Light Source. The three‐component cell permits optical centring of the crystal and in situ pressure modification to a precision of 1 bar. Compression of hexamethylenetetramine and its deuterated analogue to 1000 bar was performed, showcasing the accuracy and precision of the measurements, and highlighting evidence of a geometric isotope effect.

中文翻译：

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高压蓝宝石毛细管，用于同步加速器单晶X射线衍射测量，最大压力为1500 bar

已经开发出了一种新型的蓝宝石毛细管压力传感器，用于在中等压力（200−1500 bar; 1 bar = 100 kPa）下进行单晶X射线衍射测量，可在Diamond Light Source的光束线I19上使用。三成分的样品池可以使晶体光学居中，并可以将原位压力修改为1 bar的精度。进行了六亚甲基四胺及其氘代类似物的压缩至1000 bar，显示了测量的准确性和精确度，并突出了几何同位素效应的证据。