1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt LakesChinese Academy of Sciences Xining 810008 China
2. Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province Xining 810008 China
3. University of Chinese Academy of Sciences Beijing 100049 China
4. Department of Metallurgical EngineeringCollege of Mines and Earth SciencesUniversity of Utah, 135 S 1460 E Salt Lake City UT 84112 USA