1. Department of Mining and Explosives Engineering, Missouri University of Science and Technology, 226 Mcnutt Hall 1400 N. Bishop, Rolla, Missouri 65409, USA
2. Department of Materials Science and Engineering, Missouri University of Science and Technology, 223 Mcnutt Hall, 1400 N. Bishop, Rolla, Missouri 65409, USA
3. Department of Chemistry, Missouri University of Science and Technology, 104 Schrenck Hall, 400 W. 11th St., Rolla, Missouri 65409, USA