Investigating changes in the diffuse reflectance spectra of BaSO4 powders modified with SiO2 nanoparticles exposed to proton irradiation

Михайлов, М. М.; Yuryev, S.A.; Lapin, A. N.

doi:10.1016/j.nimb.2023.03.012

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…In the MIR spectra for our samples, the ν 3 mode of SO 2− 4 contributed the strongest MIR peak. For K 2 CaMg(SO 4 ) 3 and K 2 Mg 2 (SO 4 ) 3 , the features that appeared in the regions at 1500-2000 cm −1 and 3000-4000 cm −1 were from adsorbed water [39,44].…”

Section: Mirmentioning

confidence: 99%

Spectroscopy of Magnesium Sulfate Double Salts and Their Implications for Mars Exploration

Shi,

Zhang,

Zeng

et al. 2024

Remote Sensing

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Magnesium sulfate has been widely detected on the surface of Mars. The occurrence of magnesium sulfate and mixed cationic sulfates preserves clues regarding the sedimentary environment, hydrological processes, and climate history of ancient Mars. In this study, seven magnesium sulfate double salts were synthesized in the laboratory using a high-temperature solid phase reaction or slow evaporation of aqueous solutions. The samples were analyzed using X-ray diffraction to confirm their phase and homogeneity. Subsequently, the Raman, mid-infrared spectra, and visible near-infrared spectra of these samples were collected and analyzed. Our results showed that the spectra of the analyzed magnesium sulfate double salts exhibited distinctive spectral features. These laboratory results may provide new insights for the identification of various magnesium sulfate double salts on Mars during the interpretation of in situ data collected by Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC), SuperCam, and the ExoMars Raman Laser Spectrometer (RLS). In addition, the MIR and VNIR spectra features obtained in this study provide an improved reference and spectra library for decipherment of data sourced from the Thermal Emission Spectrometer (TES), Thermal Emission Imaging System (THEMIS), and Mars Mineralogical Spectrometer (MMS).

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Section: Mirmentioning

confidence: 99%

Spectroscopy of Magnesium Sulfate Double Salts and Their Implications for Mars Exploration

Shi,

Zhang,

Zeng

et al. 2024

Remote Sensing

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“…These coatings are characterized by their diffuse reflection spectrum and integral absorption coefficient of solar radiation [21,22]. BaSO4 powders have a high reflectance in the UV, visible, and near IR regions of the spectrum [23][24][25], making them ideal for reflective coatings in spectrophotometers. The approximate band gap of BaSO4 is 6 eV, with the main absorption edge at around 200 nm [26].…”

Section: Introductionmentioning

confidence: 99%

An Analysis on Improvement of X-Ray Diffractometer Results by Controlling and Calibration of Parameters

Moradi,

Mehradnia

2023

adeletters

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The X-ray diffractometer in the laboratory is a crucial instrument for analyzing materials in science. It can be used on almost any crystal material, and if the machine parameters are appropriately controlled, it can offer a lot of information about the sample’s characteristics. Nevertheless, the data obtained from these machines are complicated by an aberration function that can be resolved through calibration. In this study, a powder comprising of Barium Sulfate (BaSO4), Zinc Oxide (ZnO) and Aluminum (Al) was used as the first sample and a single crystal sample comprised of Gallium Nitride (GaN) and Aluminum Oxide (Al2O3). The required calibration parameters of the X-ray diffractometer namely: Straight Beam Alignment, Beam Cut Alignment and Sample Tilt Alignment for two samples were analyzed and carried out. Using the results of the X-ray spectrum, important parameters such as corresponding planes for peak positions, d-spacing of planes, intensities, smallest crystallite sizes and lattice parameters, and a comparison with the reference data were all carried out. As another result, the out-of-plane alignment and Full-Width- at Half-Maximum (FWHM) value for GaN could be determined using the rocking curve.

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Investigating changes in the diffuse reflectance spectra of BaSO4 powders modified with SiO2 nanoparticles exposed to proton irradiation

Cited by 2 publications

References 22 publications

Spectroscopy of Magnesium Sulfate Double Salts and Their Implications for Mars Exploration

Spectroscopy of Magnesium Sulfate Double Salts and Their Implications for Mars Exploration

An Analysis on Improvement of X-Ray Diffractometer Results by Controlling and Calibration of Parameters

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