Sven Holbik and Rosemary Hickey-Vargas

Florida International University

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Activities (3)

Feldspar Mineral Chemistry Using the FCAEM Remotely Operable Electron Probe Micro-Analyzer. part of Mineralogy:Activities
This lab uses the remote operation of an Electron Probe Micro-Analysis (EPMA) available through the Florida Center for Analytical Electron Microscopy (FCAEM; https://fcaem.fiu.edu/), at Florida International University, Miami, to explore feldspar mineral chemistry. This lab explores detailed mineral chemistry, data normalization, and plotting compositional ranges on ternary diagrams suitable as an introductory assignment in a Mineralogy, Earth Materials, or Petrology course. This instructor-led interactive demonstration of remote Electron Microprobe use introduces students to microprobe analysis, x-ray analytical techniques, standardization, image analysis, normalization, mineral formulas and composition. The instructor can acquire images (optional) of samples containing feldspar (provided by FCAEM or instructor's samples) then select multiple points for analysis. This activity captivates student's attention and provides a hands-on instrument-led approach to introducing undergraduate students to chemical analysis and vital concepts in mineralogy and petrology.

Mineral Recalculation Using Remote Electron Microprobe Analysis part of Mineralogy:Activities
This in-class activity uses the remote capabilities of the electron microprobe (EM) system with wavelength dispersive spectrometry (WDS) available through the Center for Analytical Electron Microscopy (FCAEM; fcaem.fiu.edu) at Florida International University in Miami FL, to introduce students to microprobe analysis, determine the major chemical elements in a mineral, use the chemical data to calculate the exact chemical formula of the mineral and to plot this data on a binary phase diagram for interpretive discussions. This instructor led activity is intended as a whole-class demonstration of the EM with WDS analysis of minerals. The remote user will navigate the EM stage to find phases of interest, acquire images of phases, set up multiple points for analysis, and disseminate collected data for students to answer questions given in lab assignment.

Mineral Identification via Remote SEM Analysis part of Mineralogy:Activities
This lab uses the remote capabilities of a scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS) available through the Florida Center for Analytical Electron Microscopy (FCAEM; ...