Journal of Raman Spectroscopy最新文献_第3页

SEM/Raman spectroscopy of clathrites as analogs of authigenic carbonates in ocean worlds 用扫描电子显微镜/拉曼光谱法观察海洋世界中作为自生碳酸盐类似物的碎屑岩

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-23 DOI: 10.1002/jrs.6711

Ana de Dios-Cubillas, Olga Prieto-Ballesteros, Manfred Nachtnebel, Harald Fitzek, Hartmuth Schröttner

{"title":"SEM/Raman spectroscopy of clathrites as analogs of authigenic carbonates in ocean worlds","authors":"Ana de Dios-Cubillas, Olga Prieto-Ballesteros, Manfred Nachtnebel, Harald Fitzek, Hartmuth Schröttner","doi":"10.1002/jrs.6711","DOIUrl":"10.1002/jrs.6711","url":null,"abstract":"There is evidence from the near-infrared observations of space missions of the presence of carbonates on the surface of several ocean worlds. However, their genesis remains unresolved. We investigate the hypothesis that these carbonates may be in the form of clathrites assuming that clathrate hydrates are stable phases in the crust and ocean of these ocean worlds. In order to support this, we studied a sample of a potential clathrite from the Hydrate Ridge cold seep (Cascadia Subduction Zone), the carbonate rock fossil of clathrate hydrates, as a terrestrial analogue. We characterised the mineralogy and texture of the sample by using a coupled confocal Raman microscope and scanning electron microscopy instrument with the aim of identifying possible geo- and biosignatures, which could be relevant for future missions of exploration to ocean worlds and Mars. Our results show that aragonite is the dominant mineral phase in the clathrite sample, but Mg-calcite and dolomite were also identified. These three carbonates constitute a pattern related to clathrate hydrate formation and dissociation processes. Dolomite was defined as a biosignature of gas hydrate microbiomes because it was integrated within Mg-calcite grains precipitated after clathrate hydrate dissociation. Nevertheless, no spectral changes were observed in Raman bands of carbonate minerals that would indicate the influence of clathrate hydrates in their genesis. We also observed that Raman band positions of the associated framboidal pyrites are a characteristic signature of the associated framboid-like texture because its potential as biosignature may only be attributed by biochemical analysis.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"55 10","pages":"1057-1066"},"PeriodicalIF":2.4,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jrs.6711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Micro‐Raman study of black and red decorations of Neolithic Yangshao potteries excavated from Taiyuan city, Shanxi province, China (c. 3000 BCE) 中国山西省太原市出土的新石器时代仰韶彩陶黑红纹饰的显微拉曼研究（约公元前 3000 年）

IF 2.5 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-21 DOI: 10.1002/jrs.6714

Ying Wang, Yuanqing Yang, Liangliang Hou, Rui Guo, Fen Wang, Jianfeng Zhu, Jingrong Pei, Hongjie Luo, Tian Wang

{"title":"Micro‐Raman study of black and red decorations of Neolithic Yangshao potteries excavated from Taiyuan city, Shanxi province, China (c. 3000 BCE)","authors":"Ying Wang, Yuanqing Yang, Liangliang Hou, Rui Guo, Fen Wang, Jianfeng Zhu, Jingrong Pei, Hongjie Luo, Tian Wang","doi":"10.1002/jrs.6714","DOIUrl":"https://doi.org/10.1002/jrs.6714","url":null,"abstract":"Yangshao culture, as the most important Neolithic culture in China, is famous for its finely decorated pottery. In this work, Yangshao potteries excavated in Shanxi province, one of the core distribution areas, were studied by micro‐Raman spectroscopy combined with optical microscopy, X‐ray fluorescence, and scanning electron microscopy equipped with energy‐dispersive X‐ray spectroscopy. The color of the red decor is derived from hematite and maghemite. The black decorations on the surface are more complex, which could be divided into two types according to the Mn/Fe ratios and crystalline types: (1) low MnO2/Fe2O3 ratio and jacobsite and magnetite and (2) high MnO2/Fe2O3 ratio and hausmannite. The former color is obviously brighter than the latter. This study also demonstrates the potential of micro‐Raman microscopy in analyzing the nature of colorant crystals in Yangshao painted potteries and, therefore, better deciphering the technical details involved in the potteries of Yangshao culture.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"12 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Confocal Raman spectroscopic study of melt inclusions from peridotite xenoliths in economic and barren kimberlites from Kaapvaal Craton 卡普瓦尔克拉通经济金伯利岩和贫瘠金伯利岩中橄榄岩异长岩熔融包裹体的共焦拉曼光谱研究

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-16 DOI: 10.1002/jrs.6709

Sahroz Khan, Yana Fedortchouk, Monika Feichter, Tivadar M. Toth

{"title":"Confocal Raman spectroscopic study of melt inclusions from peridotite xenoliths in economic and barren kimberlites from Kaapvaal Craton","authors":"Sahroz Khan, Yana Fedortchouk, Monika Feichter, Tivadar M. Toth","doi":"10.1002/jrs.6709","DOIUrl":"https://doi.org/10.1002/jrs.6709","url":null,"abstract":"Melt inclusions trapped in minerals inside xenoliths from kimberlites can help to examine the composition of kimberlite melt and/or metasomatic processes in the subcratonic lithospheric mantle as well as shed more light on the role of these melts in diamond destruction. In this study, confocal Raman spectroscopy of secondary melt inclusions in olivine from xenoliths in five different Kaapvaal Craton kimberlites was used for testing any compositional differences between melt inclusions from economically productive (Bultfontein and Frank Smit) and uneconomic diamond barren (Matsoku, Thaba Putsoa, and Pipe 200) kimberlite pipes. The xenoliths represent a range of pressures (37–45 kbar) and temperatures (1000–1300°C). The 26 daughter minerals identified within melt inclusions include Ca–Mg (±Na, K, P, Cl)-bearing carbonates, alkali (±Ca, Ba, Cl, F, H2O, CO2)-bearing sulfates, phosphates, oxides, silicates, and a rare nitrate. The mineral assemblages in melt inclusions are similar in both economic and barren kimberlite pipes from the interior and the edge of the craton, indicating the similar composition of the entrapped melts in all studied samples. However, the petrographic study revealed different metasomatic processes recorded by xenoliths from barren and economic kimberlites. Metasomatism by a melt enriched in K, Ca, and H2O could be instrumental in diamond destruction and the low diamond grade of the three barren kimberlites from Lesotho. Our study revealed no effect of kimberlite melt composition on diamond preservation in the studied kimberlites: instead, diamond grade is most likely affected by diamond destruction in the mantle source prior to kimberlite emplacement with kimberlite ascent.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"55 10","pages":"1090-1104"},"PeriodicalIF":2.4,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jrs.6709","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Thermodynamically consistent derivation of excess Raman spectra 热力学一致的过量拉曼光谱推导

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-06 DOI: 10.1002/jrs.6707

Miriam Willger, Andreas Siegfried Braeuer

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Correction to “cross striation in human permanent and deciduous enamel measured with confocal Raman microscopy” 共焦拉曼显微镜测量人类永久和脱落珐琅质中的横纹 "的更正

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-04 DOI: 10.1002/jrs.6708

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Structure–spectrum relationship in the calculated Raman spectra of silicates 硅酸盐拉曼光谱计算中的结构谱关系

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-03 DOI: 10.1002/jrs.6686

Mohammad Bagheri, Hannu-Pekka Komsa

{"title":"Structure–spectrum relationship in the calculated Raman spectra of silicates","authors":"Mohammad Bagheri, Hannu-Pekka Komsa","doi":"10.1002/jrs.6686","DOIUrl":"10.1002/jrs.6686","url":null,"abstract":"Silicate minerals have a rich structural variety consisting of silicon oxide clusters or networks of any dimensionality interdispersed with different types of elements, which is reflected in marked changes in the Raman spectra. Understanding how the changes in the Raman spectra are correlated with the atomic structure would be highly desirable for fast material identification and analysis. Extracting such trends from experimental spectra can be difficult owing to the uncertainties in the structural details of the samples and in ensuring consistency between measurements from different sources. Simulated spectra, however, avoid these problems, making them a good candidate for systematic studies. Here, we study the correlation between the structure and Raman spectral features of 179 silicates derived from a database of Raman spectra simulated using first-principles calculations. We investigate the spectral similarities with a specific emphasis on materials containing isolated 0D clusters in nesosilicate (SiO4), sorosilicate (Si2O7), and cyclosilicate (Si3O9 and Si4O12) configurations. While trends identified in the previous reports can be confirmed, we find that the variations within each group of similar structural motifs tend to be larger than the changes across groups, and therefore, developing a reliable automated classification algorithm is likely to be challenging.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"55 10","pages":"1113-1123"},"PeriodicalIF":2.4,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jrs.6686","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Study of green‐coloured gems of the Roman period from the collections of the Archaeological Museum of Thessaloniki (Greece) and their possible geographic origin 研究希腊塞萨洛尼基考古博物馆收藏的罗马时期绿色宝石及其可能的地理来源

IF 2.5 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-06-01 DOI: 10.1002/jrs.6701

Maria Nikopoulou, Stefanos Karampelas, Evangelia Tsangaraki, Lambrini Papadopoulou, Christos Katsifas, Ioannis Nazlis, Annareta Touloumtzidou, Vasilios Melfos, Nikolaos Kantiranis

{"title":"Study of green‐coloured gems of the Roman period from the collections of the Archaeological Museum of Thessaloniki (Greece) and their possible geographic origin","authors":"Maria Nikopoulou, Stefanos Karampelas, Evangelia Tsangaraki, Lambrini Papadopoulou, Christos Katsifas, Ioannis Nazlis, Annareta Touloumtzidou, Vasilios Melfos, Nikolaos Kantiranis","doi":"10.1002/jrs.6701","DOIUrl":"https://doi.org/10.1002/jrs.6701","url":null,"abstract":"The study of gems in jewellery of the Roman period from known archaeological contexts may provide valuable information for the trading routes of gems in antiquity, the techniques of their manufacture and decoration, the popularity of certain gems or their relation to a specific type of jewellery. Moreover, by the correct identification of these gems, the museum will better inform its public. In the present work, 19 green‐coloured gems, which were integral parts of 14 Roman jewellery pieces, dated between the first and fourth century CE, from the collections of the Archaeological Museum of Thessaloniki in Greece, were studied. Most samples were found during rescue excavations in western and eastern Roman cemeteries of Thessaloniki, while one was found in Edessa, a city in northern Greece. All samples were investigated by using strictly non‐destructive techniques, for example, optical microscope as well as Raman and Vis‐NIR mobile instruments. For the chemical characterisation of the samples, micro‐EDXRF was used. Seventeen samples were identified as natural emeralds with characteristics similar to emeralds that originate from Egypt. Among the studied samples, a natural chrome chalcedony and an artificial glass were also identified. The geographic origin of the artificial glass is unknown and that of chrome chalcedony is under discussion with Turkey being the most possible source.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"43 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Raman study of P–T phase diagram for U3O8 八氧化三铀 P-T 相图的拉曼研究

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-05-31 DOI: 10.1002/jrs.6705

Yijia Wang, Binbin Wu, Jingyi Liu, Xu Jia, Yue Li, Benqiong Liu, Leiming Fang, Li Lei

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Modulation on structure and electric properties by tantalum of lead-free NaNbO3 ceramics 钽对无铅 NaNbO3 陶瓷结构和电气性能的影响

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-05-28 DOI: 10.1002/jrs.6706

Liguang Wang, Xiaoxia Huang, Changming Zhu, Xiaofei Su, Guibo Yu, Pinyi Zeng, Changhao Jiang, Yishuang Wang

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Detection of cystic and alveolar echinococcosis based on tissue surface-enhanced Raman spectroscopy combined with deep learning 基于组织表面增强拉曼光谱与深度学习相结合检测囊性和肺泡棘球蚴病

IF 2.4 3区化学

Journal of Raman Spectroscopy Pub Date : 2024-05-28 DOI: 10.1002/jrs.6683

Yu Du, Xiangxiang Zheng, Guodong Lv, Longfei Yin, Guohua Wu, Zhaonan You

{"title":"Detection of cystic and alveolar echinococcosis based on tissue surface-enhanced Raman spectroscopy combined with deep learning","authors":"Yu Du, Xiangxiang Zheng, Guodong Lv, Longfei Yin, Guohua Wu, Zhaonan You","doi":"10.1002/jrs.6683","DOIUrl":"10.1002/jrs.6683","url":null,"abstract":"Echinococcosis chiefly includes cystic and alveolar echinococcosis, which is a parasitic disease. It is very important to find a quick and non-staining method to determine whether a tissue sample has echinococcosis lesions; it is not only conducive to the diagnosis of echinococcosis but also conducive to the judgment after surgery. In the study, tissue surface-enhanced Raman spectroscopy (SERS) in combination with deep learning was used to classify cystic and alveolar echinococcosis and healthy controls. Silver nanoparticles served as SERS-enhanced substrates, and a large amount of tissue SERS spectra was collected. There were 24 cases of cystic echinococcosis tissue, 14 cases of alveolar echinococcosis tissue, and 21 cases of healthy control tissues, and the numbers of SERS spectra collected were 594, 410, and 990, respectively, for a total of 1994 spectra. The convolutional neural network (CNN) was used to categorize SERS spectra into three types. Four other common machine learning classification algorithms were compared with the CNN model to highlight the classification effect of the CNN model. The results show that the model with the best effect is the CNN model, whose accuracy reaches 95%. Therefore, SERS combined with the CNN model has great potential for distinguishing the tissues of cystic and alveolar echinococcosis.","PeriodicalId":16926,"journal":{"name":"Journal of Raman Spectroscopy","volume":"55 9","pages":"967-974"},"PeriodicalIF":2.4,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0