MRI: Upgrade of powder X-ray diffraction instrumentation at Vassar College

1229257 Walker这项重大研究仪器(MRI)计划拨款支持为瓦萨学院地球科学和地理系购买粉末X射线衍射仪，该学院是一家非博士授予机构。一种新的台式X射线衍射仪将取代现有的但老化的西门子D5000 X射线衍射仪(1989年款)。X射线衍射仪将支持需要对细晶材料进行快速物相鉴定和晶体结构优化的研究。将得到支持的研究包括研究低级变质岩中的粘土矿物组合以确定交代活动带，研究土壤中的层状硅酸盐以了解土壤的阳离子交换行为，以及研究湖泊沉积的粘土矿物学以了解其形成的古环境条件。该仪器将支持这所四年制文科院校的本科生研究培训，这所院校的女性和贫困学生的入学率创历史新高。

1229257WalkerThis Major Research Instrumentation (MRI) Program grant supports acquisition of a powder x-ray diffractometer for the Department of Earth Science and Geography at Vassar College, a non-Ph.D. Granting institution. A new table XRD will replace an extant but aging Siemens D5000 XRD (vintage 1989). The XRD will support research that requires rapid phase identification of fine grained materials and crystallographic structure refinement. Research that will be supported includes studies of clay mineral assemblages in low grade metamorphic rocks in order to determine zones of metasomatic activity, studies of phyllosilicates in soils to understand the cation exchange behavior of soils; and studies of the clay mineralogy of lacustrine sediments in order to understand the paleoevironmental conditions of their formation. The instrument will support undergraduate student research training at this four year liberal arts institution with a historically high enrollment of women and underprivileged students.***