1. a School of Chemistry, Physics and Mechanical Engineering , Science and Engineering Faculty, Queensland University of Technology, Brisbane , Queensland , Australia
2. b Geology Department, School of Mines , Federal University of Ouro Preto, Campus Morro do Cruzeiro , Ouro Preto , Brazil
3. c Federal University of Itajubá, Campus Itabira , Itabira , Brazil
4. d Geology Department , Federal University of Minas Gerais , Belo Horizonte , Brazil