In-situ neutron diffraction patterns were collected for a sample of as-cast U₃Si₂ during heating to 1600 °C. Anomalous changes were observed above 1000 °C, including the formation of a new diffraction peak not belonging to P4/mbm U₃Si₂, unequal changes in the peak intensities and onset of anisotropic lattice expansion. The large data-set enabled derivation of a function-fitted isotropic thermal expansion coefficient to high precision, in close agreement with previous dilatometry results but reducing linearly with temperature over the studied interval. Anisotropy in the instantaneous lattice thermal expansion corresponded to anomalies reported by White et al. (2015) at a similar temperature.

在加热至1600°C期间收集铸态U ₃ Si ₂样品的原位中子衍射图。在1000°C以上观察到异常变化，包括新的不属于P4 / mbm U ₃ Si _2的衍射峰的形成，峰强度的不均匀变化和各向异性晶格扩展的开始。大数据集可以使功能拟合的各向同性热膨胀系数推算为高精度，这与以前的膨胀法结果十分吻合，但在研究的区间内随温度线性降低。瞬时晶格热膨胀的各向异性对应于White等人报道的异常。（2015）在相似的温度下。