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) Total density of states (TDOS) and partial density of states (PDOS) of Sr-FAP and Ca-FAP.