High-pressure high temperature 57Fe Mössbauer spectroscopy in laser-heated diamond anvil cells: Applications for the mineralogy of Earths´s lower mantle and core

地球科学家一直直接关注构成地球的物质的特性和性质。然而，随着我们利用日益复杂的遥感技术探索地球更深的区域，并更详细地解释其历史，以便科学地了解其矿物和能源资源，我们比以往任何时候都更清楚地认识到，我们必须利用高压研究方面的技术进步，以便能够进行实地研究，其目标是对地球物质在极端压力和温度下的物理和化学性质进行全面表征。穆斯堡尔谱学是进行这类研究的有力工具，但到目前为止，它在高压和高温应用中的潜力还没有得到开发。拟议项目的目的是设计、组装、调试和运行一个激光加热设施，该设施经过优化，可与内部穆斯堡尔光谱设施一起原位运行，然后将用于研究结构含铁地球物质的晶体学、磁性和电子学、相关系和化学反应（铁方镁石，含铝镁硅酸盐钙钛矿和后钙钛矿，铁镍合金）在地球的下地幔和核心的条件。

Earth scientists have always been directly concerned with the identity and properties of materials that constitute the Earth. However, as we explore deeper regions of the planet with increasingly sophisticated remote-sensing technology and interpret its history in greater detail for scientific understanding of its mineral and energy resources, it becomes clearer than ever that we must exploit technological advances in high-pressure research to enable in situ studies, with the goal of a full-scale characterisation of the physical and chemical properties of Earth materials at extreme pressures and temperatures. Mössbauer spectroscopy is a powerful tool for such studies, but so far its potential for high pressure and temperature applications has not been exploited. The aim of the proposed project is to design, assemble, commission and make operational a laser heating facility optimised to operate in situ with in-house Mössbauer spectroscopy facilities, which will then be used to study the structures (crystallographic, magnetic, and electronic), phase relations, and chemical reactions of iron-containing Earth materials (ferropericlase, aluminium-bearing magnesium-silicate perovskite and post-perovskite, iron-nickel alloys) at conditions of the Earth¿s lower mantle and core.