Microstructural characterization of an opal glass in the Na2OCdOSiO2 system

Rivera, E.; Celaya, L.E.; Rincón, J.Ma.

doi:10.1016/0167-577x(87)90005-x

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…The shaded field represents the elastically modeled minimum conditions needed to generate sufficient stretching to stabilize a low-density polymorph. The peak metamorphic conditions for the Gore Mountain granulites (hexagon symbol; Spear and Markussen 1997) coincide with conditions required for tridymite to be stable at room temperature (resultant P incl calculated to be ~ −0.5 GPa) glasses (Abeele et al 1981;Rivera et al 1987) and form as low-temperature precipitates (Klasik 1975). Stable cristobalite and tridymite may form during contact metamorphism and in tectonically active zones; however, they readily convert to α-quartz with decreasing temperature (e.g., Moehlman 1935;Van Valkenburg Jr. and Buie 1945;Green and Fitz III 1993).…”

Section: Figmentioning

confidence: 92%

Significance of “stretched” mineral inclusions for reconstructing P–T exhumation history

Ashley

Darling

Bodnar

et al. 2015

Contrib Mineral Petrol

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polymorph kyanite also has the capacity to retain tensile stresses if exhumed to Earth's surface after being trapped as an inclusion in plagioclase at P-T conditions within the kyanite stability field, with the stresses developed during exhumation sufficient to produce a transformation to andalusite. These results highlight the elastic environment that may arise during exhumation and provide a potential explanation of observed inclusions whose stability fields are well removed from P-T paths followed during exhumation.

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Section: Figmentioning

confidence: 92%

Significance of “stretched” mineral inclusions for reconstructing P–T exhumation history

Ashley

Darling

Bodnar

et al. 2015

Contrib Mineral Petrol

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“…A similar ratio of aluminium and silicon indicates this particle to be kaolinite [44,46]. Particles "2" and "4" (Figures 13(c) and 13(e)) indicate the presence of silicon and oxygen in higher amount than the others and is a characteristic of tridymite phase [47,48]. Moreover, their EDX analysis also reflects (Figures 13(c) and 13(e)) the presence of calcium and carbon in addition to silicon and oxygen.…”

Section: Sem and Edx Of The Dispersed Phasementioning

confidence: 96%

“…Silica present as major phase is the tridymite mineral [47,48]. e particle marked as "2"(Figure 13(c)) also showed the presence of the elements sodium and magnesium that indicate the presence of illite and chlorite minerals as the minor phase in combination with the major tridymite phase [47,48]. In particle "3" (Figure 13(d)), oxygen is present in higher amount with aluminium, silicon, and iron in approximately same quantity.…”

Section: Sem and Edx Of The Dispersed Phasementioning

confidence: 99%

“…Particles "2" and "4" (Figures 13(c) and 13(e)) show the presence of silicon and oxygen in higher amount, and it is the characteristic of silica as the major phase. Silica present as major phase is the tridymite mineral [47,48]. e particle marked as "2"(Figure 13(c)) also showed the presence of the elements sodium and magnesium that indicate the presence of illite and chlorite minerals as the minor phase in combination with the major tridymite phase [47,48].…”

Section: Sem and Edx Of The Dispersed Phasementioning

confidence: 99%

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Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Sarma

Rajkhowa²,

Mahiuddin

2022

Journal of Chemistry

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Washing of iron ore fines and slime (10% and 25% w/v, slurry concentrations) with two types of surface-active agents (sodium humate (synthesized) and AD 200 (commercial)) at varying concentrations at pH 8 was conducted for ascertaining the efficacy of dispersants in beneficiating the low-grade iron ores. The beneficiation process follows the “selective dispersion-cum-settling technique.” The process results in the formation of a dispersed phase rich in gangue minerals and a settled phase of predominantly active hematite mineral. The stability of dispersed phase (DP) was evaluated by determination of the percentage solid content in the DP. Settling tests were performed. First-order kinetic models have been applied to the dispersion-cum-settling behaviour of both the samples, and evaluated kinetic parameters were found to have good agreement with experimental data. Removal of gangue minerals from iron ore depends on the pH of the slurry, concentration of the slurry, and concentration of the surface-active agent used. The surface-active agents at pH 8 produce ∼1.2–1.5 times more stable suspension in the case of iron ore fines and slimes than that of without surface-active agent. They significantly remove gangue minerals and increase the iron value ∼2–7% with ∼58–74% recovery depending on the experimental conditions. The concentrates collected satisfy the required specifications (Al203/Fe < 0.05 and Al203/Si02 < 1). The gangues in the dispersed phase as characterised by “SEM-EDXA” are mostly clay-bearing minerals like kaolinite, goethite, chlorite, and alumina-silicate minerals. Heat treatment causes distortion of clay minerals present in the dispersed phase and also indicates the complex nature of the gangue minerals.

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Synthesis, Thermal, Structural, Microhardness Properties and Gamma-Ray Attenuation Efficiency of Cd2+ and Fe3+ Co-doped Na2O-CaO-SiO2 Glasses

Mahdy

Alsaif

Rammah

et al. 2023

J. Electron. Mater.

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Microstructural characterization of an opal glass in the Na2OCdOSiO2 system

Cited by 7 publications

References 1 publication

Significance of “stretched” mineral inclusions for reconstructing P–T exhumation history

Significance of “stretched” mineral inclusions for reconstructing P–T exhumation history

Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Synthesis, Thermal, Structural, Microhardness Properties and Gamma-Ray Attenuation Efficiency of Cd2+ and Fe3+ Co-doped Na2O-CaO-SiO2 Glasses

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