2009年12月1日 · In this study, we synthesized the minerals BaSO 4, SrSO 4, and their solid-solution phases (Ba 0.76 Sr 0.24 SO 4, Ba 0.5 Sr 0.5 SO 4, and Ba 0.2 Sr 0.8 SO 4), and conducted a subsequent study on the vibration-mode variation of Raman spectroscopy in relation to an increase in pressure.

Mn⁶⁺ doped BaSO4 with broadband emission from 900 nm to 1400 nm is emerging as a new class of NIR phosphor for fluorescence imaging. Manganese has diverse valence states, thus it is difficult to...

The Raman spectra recorded for samples with various BaSO4 contents display a continuous change in both peak positions and peak widths. The slight decrease in n1 frequency for crystals with low Ba/Pb ratio may be attributed to the net effect of the S–O force constants, intertetrahedral O–O force constants, and distortions of SO4 tetrahedra.

Here we show that Raman spectroscopy provides a simple, selective, and sensitive method for screening milk, specifically for small nitrogen-rich compounds, such as melamine, urea, ammonium...

2013年9月5日 · XRD, absorption spectra, Raman spectra and luminescence properties of BaSO 4:(Mn 6+, Mn 5+) crystal were investigated. The experimental results confirmed that Mn 6+ and Mn 5+ ions coexisted in the crystal.

2003年12月1日 · High-pressure Raman spectroscopic and X-ray diffraction experiments of barite, BaSO4, were carried out in a diamond anvil cell up to 25 GPa at room temperature. On the basis of the changes in...

2010年5月13日 · High-pressure Raman spectroscopic and X-ray diffraction experiments of barite, BaSO 4, were carried out in a diamond anvil cell up to 25 GPa at room temperature. On the basis of the changes in the diffraction patterns and the variation of lattice parameters with pressure, it is inferred that barite undergoes a phase transformation at 10 GPa.

2003年1月1日 · new pressure flow cell to monitor baso4 precipitation using synchrotron in-situ angle dispersive x-ray diffraction

2009年12月1日 · High-pressure Raman spectroscopic and X-ray diffraction experiments of barite, BaSO4, were carried out in a diamond anvil cell up to 25 GPa at room temperature. On the basis of the changes in the…

Unlike the limited PbSO4 content observed in natural specimens, the present study reveals that (Ba,Pb)SO4 crystals can be grown with compositions covering the whole solid solution series of PbSO4 and BaSO4. X-ray measurements show that the unit cell parameters gradually increase with increasing BaSO4 content.