Behaviour of hingganite-(Y), Y2□Be2Si2O8(OH)2, on compression to 47 GPa has been studied by synchrotron-based in situ high-pressure single-crystal X-ray diffraction at room temperature in a diamond anvil cell. In the studied pressure range no obvious phase transitions have been observed. The compression of hingganite-(Y) crystal structure is anisotropic, with b axis showing the maximal compressibility. A fit of the experimental pressure–volume data by the Birch-Murnaghan third-order equation of state yielded the bulk modulus of 131(2) GPa and its pressure first derivative of 3.5(2). The difference between high-pressure behaviour of hingganite-(Y) and structurally related datolite is governed by the different chemical nature of interlayer cations.

中文翻译：

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Hingganite-(Y) 的可压缩性：高压单晶 X 射线衍射研究

Hingganite-(Y), Y2□Be2Si2O8(OH)2 在压缩至 47 GPa 时的行为已通过基于同步加速器的原位高压单晶 X 射线衍射在室温下在金刚石砧座中进行了研究。在研究的压力范围内没有观察到明显的相变。Hingganite-(Y) 晶体结构的压缩是各向异性的，b 轴显示出最大的可压缩性。通过 Birch-Murnaghan 三阶状态方程拟合实验压力-体积数据得出 131(2) GPa 的体积模量和 3.5(2) 的压力一阶导数。Hingganite-(Y) 和结构相关的 Datolite 的高压行为之间的差异是由层间阳离子的不同化学性质决定的。