Rock Tech Lithium (CVE:RCK) announced late Wednesday it has achieved a purity level of 99.988% lithium carbonate (Li2CO3) from a bulk sample taken from its wholly owned Georgia Lake project in Thunder Bay, Ontario.
As announced in late June, preliminary results of the metallurgical sample testing produced a purity level of 99.963% Li2CO3. The sample was then processed through a bicarbonate polishing step, which produced the 99.988% purity.
Battery manufacturers require a purity level of at least 99.5% Li2CO3.
President and CEO, Eunho Lee, commented: "The study clearly demonstrates that a high-quality, battery-grade lithium carbonate product can be produced from the lithium-bearing pegmatites found at Rock Tech's Georgia Lake project."
In other news, Rock Tech also announced the drill results of the remaining 22 holes from its 2010/2011 winter exploration program, which completed nearly 8,000 metres of diamond drilling at the company's Nama Creek and Conway claim blocks.
At the Nama Creek North block, located on the northern end of the Georgia Lake property, assays returned 10.55 metres grading 1.22% lithium oxide (Li2O), as well as 458 parts per million (ppm) beryllium oxide (BeO) and 854 ppm rubidium oxide (Rb2O), in hole NC11-14.
On this same block, assays also returned 6.7 metres grading 1.39% Li2O, 423 ppm BeO, and 988 ppm Rb2O, in hole NC11-07.
On the Nama Creek South claim block, drilling intersected 12.75 metres grading 0.9% Li2O, 450 ppm BeO, and 790 ppm Rb2O, in hole NS11-01, and 4.12 metres at 1.37% Li2O, 459 ppm BeO, and 993 ppm Rb2O, in hole NS11-02.
Hole PL11-01, drilled on the Parole Lake claim block, found 6.29 metres at 2.0% Li2O, 400 ppm BeO, 563 ppm Rb2O, and 111 ppm niobium oxide (Nb2O5).
Meanwhile, on the Conway Main claim block, located to the east of Nama Creek, hole CW11-09 returned 10.25 metres of 0.9% Li2O, 315 ppm BeO, and 1,029 ppm Rb2O.
The Vancouver, B.C.-based company said it plans to release its initial NI 43-101 compliant resource estimate for the Nama Creek and Conway claim blocks in the coming weeks, with phase two drilling on the Georgia Lake property also expected to begin at that time.