Structural Symmetry Analysis of Mono Sodium L-glutamate Pentahydrate by Whole Powder Pattern Fitting Method: A Powder X-ray Line Diffraction Study

Abstract

The crystallographic bibliography of mono-sodium L-glutamate pentahydrate (MSLGPH) revealed a unique, unparalleled structural geometry using powder X-ray diffraction (XRD). The XRD analysis revealed the atomic structure of MSLGPH crystals, providing a detailed refinement of lattice parameters and crystal symmetry of the orientation. Crystallography revealed a dislocation density of 2.009 × 10⁻⁴ nm⁻², a crystallinity index of 1.98, a unit cell density of 1.48 g/cm³, and a specific surface area of 57.46 m²/g, contributing to a unique structural geometry. Rietveld refinement confirmed a unified 100 % crystalline phase using the whole powder pattern fitting (WPPF) method. The calculated lattice parameters are a= 6.224, b= 16.669, c= 5.992 Å; α= 98.77, β= 99.83, γ= 98.54° in a triclinic crystal system with lattice volume of 595.565 ų and crystal strain of 0.163 %. The strongest diffraction is distinct at 2θ= 20.364° (0-31) plane. Various models were used to estimate crystallite size, with the Scherrer equation exploring an average crystallite size of 70.55 nm for nano-size confirmation.