Chemical preparation, crystal structure and vibrational study of MnNa3P3O10.12H2O and X-ray characterization of the new anhydrous triphosphate MnNa3P3O10. (2nd January 2022)

• Record Type: Journal Article
• Authors: Majdi, El Mehdi; Zerraf, Soufiane; Belhabra, Mustafa; Belaaouad, Said
• Is Part Of: Phase transitions. Volume 95:Number 1(2022)
• Page Start: 50
• Page End: 63
• Publication Date: 2022-01-02
• Subjects: Triphosphate -- X-ray diffraction -- infrared -- Raman -- spectroscopy isotopic substitution -- dehydration; Phase transformations (Statistical physics) -- Periodicals; 530.47405
• DOI: 10.1080/01411594.2021.2009478
• Languages: English
• ISSNs: 0141-1594

Abstract

ABSTRACT: The MnNa3 P3 O10 .12H2 O was prepared by the ion exchange resin process. Its structure was studied by X-ray diffraction and determined in the monoclinic, space group P1 21 /c1 with the unit-cell parameters a = 14.6650 (5) Å, b = 9.1916 (3) Å, c = 15.0239 (5) Å, α = γ = 90 °, β = 90.2210 (10) °, Z = 4 and V = 2025.13 (12) Å3. The thermal dehydration of this compound was performed, leading to an anhydrous new form MnNa3P3O10, which was characterized by X-ray diffraction. The obtained MnNa3 P3 O10 is monoclinic of space group: P21 /n with the unit-cell parameters: a = 15.3774 (1) Å, b = 7.6988 (5) Å, c = 14.2832 (3) Å, β = 92.9115 (5) °. The characteristic IR wavenumbers of the P3 O10 5− ions observed in the vibrational spectra were calculated by using isotopic substitutions, which confirms the existence of these groups in the studied compound. A comparison between the IR and Raman wavenumbers of MnNa3 P3 O10 .12H2 O, MnNa3 P3 O10 and Na5 P3 O10 .12H2 O was performed. A kinetic study was also made for MnNa3 P3 O10 ·12H2 O.