Zeitschrift für Kristallographie - Crystalline Materials · 2003 · 69 citations · 20 references
Natural SciencesMaterials EngineeringMaterials ScienceCrystal StructureMechanical Behavior Of MaterialsStructural MaterialsLattice StructuresX-ray CrystallographyX-ray DiffractionComparative X-ray CrystallographyHigh-pressure CrystallographyHydrostatic PressureLattice StrainPowder DiffractionPowder Diffraction AnalysisPowder X-ray DiffractionStructure-property Relationships In Polymorphs
Abstract The effect of hydrostatic pressure up to 4 GPa on the two polymorphs of glycine α — s.g. P 2 1 / n , and γ — s.g. P 3 1 ( P 3 2 )) was studied by X-ray powder diffraction using a synchrotron radiation source ( λ = 0.7 Å, a MAR345 image plate detector). No polymorphic transformations were detected. Relative volume changes and the aniso tropy of structural distortion of the two polymorphs were compared. The directions of maximum and minimum lattice strain were related to the directions of weak and strong hydrogen bonds in the structures.
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