Assertion: lattice parameter | /r/CapableOf | use x-ray or neutron diffraction
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text: Lattice parameters and their variations with temperature are now routinely determined at very high accuracy173 and precision using x-ray or neutron diffraction, especially with the aid of high-resolution equipment at synchrotron sources, providing standard uncertainties as low as 10− 6 Å.174 As long as the temperature at the sample also is determined accurately, diffraction can provide reliable CTEs, often to two or three significant figures, less if the CTE is very small.