Win_Strain

Developer's DescriptionBy Ross AngelCalculate the strain between two sets of unit-cell parameters.Win_Strain is essential for interpreting changes in unit-cell parameters with changes in temperature, pressure or composition, or for calculating the components of the spontaneous strain arising from a phase transition. When the components of the strain tensor are normalized by the temperature or pressure change, the thermal expansion and compressibility tensors are obtained. For crystals of monoclinic or triclinic symmetry the orientation of the principal axes of strain with respect to both the Cartesian axial system and the crystallographic axes is also calculated. This is also the orientation of the strain ellipsoid and strain quadric representations of the strain.