According to one embodiment, a glass composition may include from 67 mol. % to about 75 mol. % SiO2； from about 6 mol. % to about 10 mol. % Al2O3； and from about 5 mol. % to about 12 mol. % alkali oxide. The alkali oxide may include K2O in an amount less than or equal to 0.5 mol. %. The glass composition may further include from about 9 mol. % to about 15 mol. % of alkaline earth oxide. The alkaline earth oxide may include greater than about 0 mol. % and less than or equal to 3 mol. % MgO, from 2 mol. % to about 7 mol % CaO, at least one of SrO and BaO. The glass composition may further include less than 1 mol. % B2O3. A ratio of a concentration of MgO to the sum of the concentration of divalent cations (MgO:ΣRO) may be less than 0.3.
