Elastic, vibrational, and thermodynamic properties of Sr10(PO4)6F2 and Ca10(PO4)6F2 from first principles
Kong Xianggang1, Yuan Zhihong1, Yu You2, Gao Tao1, 3, †, Ma Shenggui1
       

(color online) Phonon total density of states and phonon partial density of states for Sr-FAP and Ca-FAP.