The Polarized Infrared Spectra of Hydroxyl Ion in Fluorapatite

Single crystal growth of Pb5(PxAs1−xO4)3Cl solid solution with apatite type structure

“…5 shows that the relationship between chemical composition and its unit cell parameter is completely linear from pyromorphite to mimetite. FT-IR spectra, resembling those of previous reports [18,21,22], show distinct peak features in a lowfrequency region between 500 and 600 cm À1 , an intermediate region centered near 800 cm À1 , and a highfrequency region between 900 and 1100 cm À1 (Fig. 6).…”

Isomorphic substitution in vanadinite [Pb5(VO4)3Cl]—a Raman spectroscopic study

“…Scanning electron microscope (SEM) images of the minerals show that the surfaces of the minerals have been severely etched and are most likely that these compounds above showing as 3 Table 2. Two intense bands are observed at 827 and 790 cm 1 with a weak band at around 730 cm 1 [ Fig.…”

“…Vanadinite [Pb 5 (VO 4 ) 3 Cl] is a comparatively rare secondary mineral found in the oxidized portions of lead veins, often associated with other secondary minerals such as mimetite and pyromorphite. The mineral is characterized by its crystal form and colour with high lustre and density.…”

“…Levitt and Condrate,3 based on the analysis of the spectra of lead apatites, reported the 2 band for vanadinites at 320 cm 1 . Ross 2 reported the 3 modes of vanadinites at 800 and 736 cm 1 and the 4 modes around…”

Spencerite from Kabwe, Zambia, and the infrared spectroscopy of the Kabwe zinc phosphates

“…PO 4 u2is at 436 em -I In pyromorphite (Levitt and Condrate, 1970 maxima by degeneracy removal cannot resolve this problem, unfortunately, as both C1 and C2 symmetry would involve loss of all degeneracy, giving nine infrared active modes (1 x vl, 2 x v2, 3 x va, 3 x v4). The spectra of spencerite, parahopeite and scholzite appear to show only one absorption maximum each in the PO4v 2 region (at 417,425 and 420 cm-~ respectively) as though their site symmetries were C2v or higher.…”