![]() These results indicate that these elements are of primary interest in sourcing the clays used to make the slips, and trends in the chemical composition of each color have the potential to reveal much about Maya potters' processes and standardization in slip production. Iron, zinc, molybdenum, tin, and antimony concentrations were the principal determinants of compositional groups. The data produced through pXRF spectrometry revealed that red slips were chemically distinct from the other two colors, while white and black slips were chemically indistinct. This thesis broadens our understanding of Maya slips by 1) establishing portable x-ray fluorescence (pXRF) spectrometry as a nondestructive analysis technique that can be used to chemically characterize slips on a wide range of sherd sizes and whole vessels, and 2) determining the chemical compositions of red, cream, and black slips on Middle and Late Preclassic-period ceramic sherds excavated in 2017 from Holtun, Guatemala. Such studies present an incomplete picture of Maya slips, since they only include later ceramics and exclude vessels from which samples cannot be taken. Though slip color has long been used as an attribute for classification in the Maya lowlands, only recently have the raw materials of slips been used to inform studies of production and exchange, with much of this work using Late and Terminal Classic-period ceramics and analysis techniques that require taking small samples of each ceramic to be analyzed. The potter can select a slip to provide a more appealing color, texture, and/or luster to the vessel's surface, while maintaining the favorable functional qualities of the paste. Physical Chemistry Research subject Chemistry of Interfaces Identifiers URN: urn:nbn:se:ltu:diva-13642 DOI: 10.1016/j.jcis.2011.10.064 ISI: 000299490500063 PubMedID: 22115160 Scopus ID: 2-s2.0-84855839453 Local ID: ce3107cd-e1da-4d72-a668-e1b8f6b8ba29 OAI: oai:DiVA.Slip, a fluid suspension of clay that is applied to the surface of a piece of ceramic, allows for increased control over the functional and aesthetic properties of a finished vessel. Place, publisher, year, edition, pages2012. Besides that, useful correlations between 31P CSA parameters and structural data on this complex were also established. Find Sodium Benzoate Manufacturers, Zinc Oxide Manufacturers, Calcium Stearate. In this novel molecular structure, the central antimony atom S,S’-anisobidentately coordinates three structurally non-equivalent DTP groups and, therefore, the geometry of the chromophore can be approximated by a distorted octahedron. Top Chemical Antimony Trioxide Manufacturers in Vadapalani, Chennai. Using single-crystal X-ray diffraction technique, the molecular structure of a solvated form of crystalline O,O’-di-cyclo-hexyldithiophosphate antimony(III) complex has been resolved. 31P CP/MAS NMR and chemical shift anisotropy data indicate that the S–P–S bite angle of the chemisorbed DTP groups on the surface is larger than in the corresponding precipitated complexes and the coordination of the ligands differ. At high concentration of DTP, a surface precipitate of Sb(DTP)3 is formed. The results show that a low concentration of collector at the surface leads to a chemisorbed monolayer of DTP on the mineral surface. Corresponding individual complexes have also been synthesized and used for comparison with the surface adsorbed DTP species. ![]() ![]() 488-495 Article in journal (Refereed) Published Abstract įour different dialkyldithiophosphate (DTP) ions, (RO)2PSS– (R = C3H7, iso-C3H7, iso-C4H9, cyclo-C6H11) have been adsorbed on the surface of synthetically prepared stibnite, Sb2S3, and studied by means of 31P CP/MAS NMR. 2012 (English) In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. ![]()
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