Daniel Mast

Daniel Mast

Status: 4th year Ph.D. Candidate, Radiochemistry

Project: Structural behavior of technetium metal and technetium oxides under non-ambient conditions

Advisor: Dr. Paul Forster

Email: Daniel.mast@unlv.edu

Education:

  • B.S. Chemistry St. Martin’s University, 2013
  • B.A. Mathematics St. Martin’s University, 2013

 

Research:

Extreme conditions of high pressure and high temperature can be used observe physical and chemical changes in structure, magnetism, superconductivity, and reactivity which means that we can access novel synthetics routes not available at ambient pressure. This project is focused on the behavior of technetium metal and technetium oxides at nonambient condition, high pressure and high/low temperature. Diamond Anvil Cells (DACs) are used to create the extreme pressures where we perform in situ single crystal and powder X-ray diffraction. DAC experiments at conducted at synchrotron sources across the country including the Advanced Photon Source, APS at Argonne National Laboratory, ANL and the Advanced Light Source, ALS at Lawrence Berkeley National Laboratory, LBNL. This work is conducted in collaboration with the High Pressure Science and Engineering Center (HiPSEC) and the Radiochemistry Group at UNLV.

The project is divided into three chemical systems, the metal and two known oxides of technetium, TcO2 and Tc2O7. 1) Equation of state studies of technetium metal are vital for all high pressure technetium work going forward. This project includes high resolution ambient structure determination, high pressure equation of state measurement and thermal expansion measurements all using powder X-ray diffraction. 2) The phase stability investigation of the family of transition metal dioxides including: technetium, rhenium, molybdenum, and tungsten. This project is conducted using high pressure powder and single crystal diffraction to observe structural changes in these materials and map the phase boundary of each system. 3) The redetermination of the structure of Tc27 has led to an investigation of this molecular solid at low temperature. Anomalous thermal expansion behavior is explored using single crystal X-ray diffraction.

 

National Laboratories:

  • Synchrotron X-ray powder and single crystal diffraction in a diamond-anvil cell at the Advanced Photon Source (APS) at Argonne National Laboratory and at the Advance Light Source (ALS) at Lawrence Berkeley National Laboratory
  • INL Intern, Summer 2016, Mentor: Dr. Krzysztof Gofryk
  • LLNL CMMD Intern, Summer 2014, Mentor: Dr. William Evans

 

Professional schools & workshops:

  • Workshop on high-pressure multigrain crystallography, HPCAT, ANL 2016
  • 11th LANSCE School on Neutron Scattering, Lujan Center, LANL 2015
  • International Union of Crystallography High Pressure Workshop, CNPEM , Campinas 2015
  • School of Synchrotron Crystallography, ChemMatCars, ANL, 2014
  • International School on Fundamental Crystallography 2014, IUCr, 2014
  • Paris-Edinburgh Cell Workshop, HPCAT, ANL 2013
  • Nuclear Chemistry Summer School, ACS, BNL 2012
  • ACS National Leadership Institute 2012

 

Awards:

  • Nuclear Energy University Program-Nuclear Engineering Fellow, 2014-17
  • Malcolm F. Nicol Graduate Scholar, 2013-14
  • ACA Travel Grant 2016
  • International Union of Crystallography Student Travel Grant 2015
  • UNLV Graduate and Professional Student Association Travel Grant 2014, 2015, 2016
  • Innovations in Fuel Cycle Research Award, ANS 2016
  • Margaret C. Etter Student Lecturer Award Materials SIG, ACA 2016
  • Margaret C. Etter Student Lecturer Award Powder SIG, ACA 2015
  • UNLV Radiochemistry Campus Involvement Award 2015
  • Rebel Grad Slam Finalist 2014, 2015

 

Publications:

  • Ø  D.S. Mast, E. Kim, E. Siska, F. Poineau, K.R. Czerwinski, B. Lavina, and P. M. Forster, Equation of state for technetium from X‐ray diffraction and first-principle calculations, Journal of Physics and Chemistry of Solids, Volume 95, August 2016, Pages 6-11, ISSN 0022-3697, http://dx.doi.org/10.1016/j.jpcs.2016.03.007. Ø
  • Bradley C. Childs, Henrik Braband, Keith Lawler, Daniel S. Mast, Laurent Bigler, Urs Stalder, Paul M. Forster, Kenneth R. Czerwinski, Roger Alberto, Alfred P. Sattelberger, and Frederic Poineau, Inorganic Chemistry 2016 55 (20), 10445-10452 DOI: 10.1021/acs.inorgchem.6b01683
  • Keith V. Lawler, Bradley C. Childs, Daniel S. Mast, Kenneth R. Czerwinski, Alfred P. Sattelberger, Frederic Poineau, and Paul M. Forster Inorganic Chemistry2017 56 (5), 2448-2458 DOI: 10.1021/acs.inorgchem.6b02503

 

Presentations:

National/International

  • 67th American Crystallographic Association Annual Meeting, New Orleans 2017 (Oral)
  • Stewardship Science Academic Programs Symposium, NNSA, Chicago 2017 (Poster)
  • American Nuclear Society Winter Meeting & Expo, Las Vegas, 2016 (Oral, Invited)
  • 54th European High Pressure Research Group Meeting, Bayreuth 2016 (Oral)
  • 30th European Crystallographic Meeting, Basel 2016 (Poster)
  • Stewardship Science Academic Programs Symposium, NNSA, Bethesda 2016 (Poster)
  • 66th American Crystallographic Association Annual Meeting, Denver 2016 (Oral)
  • International Union of Crystallography High Pressure Workshop, CNPEM , Campinas 2015 (Poster)
  • 65th American Crystallographic Association Annual Meeting, Philadelphia 2015 (Oral)
  • 2nd Joint Italian Crystallographic Association and Italian Synchrotron Radiation Society, Florence 2014 (Poster)
  • 52nd European High Pressure Research Group International Meeting, Lyon (Poster) 2014
  • Research at High Pressure, Gordon Research Conference/Seminar, (Poster) 2014
  • American Chemical Society Meeting Spring 2013 (Poster),

Local

  • Inspiration, Innovation, Impact: Graduate Research Forum, UNLV, Las Vegas 2016(Oral)
  • Xtreme Crystal Workshop, UNLV, Las Vegas Fall 2016 (Oral) Spring2016 (Poster)
  • UNLV GPSA Graduate Research Symposium, UNLV 2015(Poster), 2016 (Poster)
  • NNSA Annual HiPSEC Review, UNLV Las Vegas, 2015(Oral)
  • LLNL Annual Summer Student Symposium, Livermore, (Poster) 2014
  • NNSA Annual HiPSEC Review, UNLV Las Vegas, 2014(Poster)
  • ACS Northwestern Regional Undergraduate Research Symposium, Seattle (Poster) 2013

 

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