Research on the Composition,Structure and Deep Processing Technology of Tourmaline

Tourmaline is a kind of silicate mineral which contains boron as a main element and several other minor elements such as lithium,sodium,iron,magnesium,aluminum,these elements build up the ring structure of silicate minerals.Tourmaline is consisted of lithium tourmaline,black tourmaline and magnesium tourmaline.Taking the black tourmaline as an example,the crystal structure was introduced in this paper and the technologies for preparation of micro-tourmaline and nano-tourmaline powder materials were summarized in this article.