基本介紹
主要產地為瑞典拉普蘭Leveniämi礦,美國阿拉巴馬州 Indian Mountain等地。
Name:
Named after Johann August Streng [February 4, 1830 Frankfort, Germany - January 7, 1897 Giessen, Germany], Professor of Mineralogy, University of Giessen, Germany. Streng was an assistant to Robert Bunsen at University of Heidelberg and later professor of chemistry at the Clausthal Mining Academy. Streng was an innovator in new methods of chemical titration.