Temperature (°C) 1200 Li 7+12 1100 12 a+L 1000 y+B L₁+L 900 18 800 α+12 B+12 700 α+β 600 500 B+n 0+B 400 300 α+ θ 0 200 100 θεη A 20 40 60 Weight percent B 80 B