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High-Pressure Raman Study on anglesite

World Journal of Condensed Matter Physics 2013年第1期3卷 28-32页

作者： Pei-Lun Lee Eugene Huang Shu-Cheng Yu Yen-Hua Chen Department of Creative Fashion Design and Management Chung-Chou University of Science and Technology Yenlin Taiwan Department of Earth Science National Cheng-Kung University Tainan City Taiwan General Education Center National Chia-Yi University Chiayi Taiwan

High-pressure Raman spectroscopic experiments of anglesite, PbSO4, were carried out in a diamond anvil cell up to about 35 GPa at room temperature. Two stages of changes in the pattern of wavenumber-versus-pressure plot were observed in most of the vibrational modes. The first stage of change is the kink in the slope of wavenumber-versus-pressure plot at about 14 GPa, indicating a change in the force constant of modes. Further compression up to 21 GPa causes the splitting in the S-O stretching modes, representing the distortion of SO4 tetrahedron. The behavior of transition observed in PbSO4 is similar to that of BaSO4 as well as those found in the solid solution series of BaSO4-SrSO4. Transitions taking place at higher pressure for anglesite is due to the relatively greater value of electronegativity for Pb2+, as compared with M2+ in other complex compounds of similar structure.

关键词： anglesite High Pressure Raman Spectroscopy Electronegativity

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In situ infiltration-precipitation processes in some rock systems

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Acta Geochimica 2023年第5期42卷 870-878页

作者： Zahraa Ibrahim Rabih Sultan Department of Chemistry American University of BeirutBeirutLebanon

We carry out a chemical treatment(acidization or basification)of typical rock specimens in-situ,and characterize the emerging pattern resulting from the infil-tration-precipitation *** and limestone sam-ples were treated with sulfuric acid,while pyrite was reacted with sodium *** infiltration tech-niques were employed,after selection of the most feasible method for each rock *** patterns of anglesite(PbSO_(4)),anhydrite(CaSO_(4))and goethite(FeOOH)depo-sition presented different alteration modes of the bare rock *** the three deposited minerals,only the anhydrite(CaSO_(4))displayed a band *** formation of a Liesegang pattern in the rock of highest porosity indicates a plausible correlation between the band formation and a minimum porosity requirement.A banded rock of compact texture could then be formed by a cementation mechanism,governing the long time evolution of the rock.

关键词： Liesegang Limestone Galena Pyrite anglesite Goethite Reaction–diffusion Percolation Porosity Pattern formation

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Occurrence of lead and silver minerals and their interaction with xanthate in slurry of zinc electrolysis anode slime

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Transactions of Nonferrous Metals Society of China 2012年第7期22卷 1794-1800页

作者：向平冯其明朱阳戈邓杰龙涛钮因健中南大学资源加工与生物工程学院长沙410083 株洲市湘麒资源综合利用研究所株洲412005

The background pulp potential of zinc anode slime,and its influence on the occurrence of lead,silver and xanthate,were investigated with thermodynamic *** thermodynamic conclusion and XRD analysis pointed out that in zinc anode slime,the thermodynamically stable compound of xanthate is dixanthogen,anglesite is the only mineral of lead,and kerargyrite is one of silver minerals *** tests on single minerals of anglesite and kerargyrite in sulfuric acid solution by amyl dixanthogen indicated that dixanthogen has a much stronger collecting ability to kerargyrite than to *** dynamic simulation indicated that amyl dixanthogen can only be adsorbed on the surface of kerargyrite in the presence of SO42-.The FTIR tests also verified the selective adsorption of amyl dixanthogen on the surface of kerargyrite in the presence of SO42-.

关键词： zinc electrolysis anode slime anglesite kerargyrite xanthate adsorption

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