Fig. 7: The crystal structure of (RE10.25RE20.25Yb0.25Lu0.25)2Si2O7.

a, c Crystal structure of β- and γ-(RE10.25RE20.25Yb0.25Lu0.25)2Si2O7, respectively; b, d projection of β- and γ-(RE10.25RE20.25Yb0.25Lu0.25)2Si2O7 along the c axis, respectively.

a, c Crystal structure of β- and γ-(RE10.25RE20.25Yb0.25Lu0.25)2Si2O7, respectively; b, d projection of β- and γ-(RE10.25RE20.25Yb0.25Lu0.25)2Si2O7 along the c axis, respectively.