SGER: Quantitative Microbeam Determination of Iron Valence Using XPS

SGER：使用 XPS 定量微束测定铁价

• 批准号: 9307389
• 负责人: Derrill Kerrick
• 金额: $ 2.45万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9307389&HistoricalAwards=false
• 关键词: SGER; Quantitative; Microbeam; Determination; Iron

9307389 Kerrick The objective of this exploratory project is to develop a microbeam technique (~40 um spot size) for the in situ analysis of ferric and ferrous iron in silicate minerals and glasses in polished thin sections. The proposed technique involves analysis by x-ray photoelectron spectroscopy (XPS) of a fresh surface produced by cleaving or scraping the material of interest within the high vacuum sample chamber. Successful development of the technique would enable geoscientists to study the spatial variations of feric iron in compositionally zoned minerals, and it would eliminate the need for sample preparation that is both time-consuming and potentially oxidizing. The analytical results would find application in the study of redox processes and in thermobarometry of metamorphic rocks.

9307389 Kerrick这个探索性项目的目的是开发一种微型技术（〜40 um斑点尺寸），以在抛光薄片中对硅酸盐矿物质和玻璃杯中的铁和亚铁铁进行原位分析。提出的技术涉及通过X射线光电子光谱（XP）分析，该光谱法（XPS）是通过在高真空样品室内切割或刮擦感兴趣的材料而产生的新鲜表面。 该技术的成功开发将使地球科学家能够研究构图分区矿物质中芬特铁的空间变化，并且它将消除既耗时又可能氧化的样品制备的需求。 分析结果将在研究氧化还原过程和变质岩石测量法中的应用。