Lithi um Mi ne ra ls at S ep ar ati on Rap id s Ther e are two main li thium ore mineral s in the Sepa rati on Rapi ds LCT pegmati te p e t al i te l e p i dol it e Peta li te is the pr edominant li thium mineral with lepidol ite oc c urr ing in d istinc t s ubz ones c omprising 20 of the resourc e P e t ali t e Li Al Si 4 O 10 ty pically conta ins 45 Li 2 O with v ery low impuri ties L e p id ol it e KLi AlR b 2 Al Si 4 O 10 F O H 2 is a li thi um mica c ontaini ng other elements They c an each be c onc entrated to mak e saleable produc ts Peta li te c an be us ed both as an indus tri al mineral for high s tre ngth gl ass and as a hi gh pur ity feed to make batter y grade li thium hy droxide or c arbonate Lepidoli te c onc entrates are being us ed i nc reasingly for produc tion of battery grade li thium c arbonate Cl ea r Cr y s tal l ine P eta l i te ab ov e P urpl e Le pi do l ite be l ow 13