Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1408915 | Journal of Molecular Structure | 2013 | 6 Pages |
This research was undertaken on phosphophyllite sample from the Hagendorf Süd pegmatite, Bavaria, Germany. Chemical analysis was carried out by Scanning Electron Microscope in the EDS mode and indicates a zinc and iron phosphate with partial substitution of manganese, which partially replaced iron. The calculated chemical formula of the studied sample was determined to be: Zn2(Fe0.65, Mn0.35)∑1.00(PO4)2·4(H2O). The intense Raman peak at 995 cm−1 is assigned to the ν1PO43- symmetric stretching mode and the two Raman bands at 1073 and 1135 cm−1 to the ν3PO43- antisymmetric stretching modes. The ν4PO43- bending modes are observed at 505, 571, 592 and 653 cm−1 and the ν2PO43- bending mode at 415 cm−1. The sharp Raman band at 3567 cm−1 attributed to the stretching vibration of OH units brings into question the actual formula of phosphophyllite. Vibrational spectroscopy enables an assessment of the molecular structure of phosphophyllite to be assessed.
► Chemical analysis of phosphophyllite was carried out by Scanning Electron Microscope in the EDS mode. ► The chemical formula was determined to be: Zn2(Fe0.65, Mn0.35)∑1.00(PO4)2·4(H2O). ► The mineral was characterized by both Raman and infrared spectroscopy. ► An assessment of the molecular structure was made. ► A comparison is made with the spectra of other zinc phosphate minerals.