The specific heat of Li2O·Al2O3·nSiO2glasses and keatite‐phase glass ceramics, withn=4,6,8,10,12 has been measured between 1.5 and 6 K. The temperature dependence of the specific heat was determined by using several least‐squares fits to the data and found to be of the formC=C1T+C3T3. Generally, for a given composition, the magnitude ofC3for the glass ceramic is larger than the value for the corresponding glass. For a given structure,C3also shows a composition dependence. Estimates forC1show a dependence on both composition and structure. The results are compared to those obtained for vitreous silica.