Prosopite

Al₂Ca_0.96F_4.28H_3.72O_3.72Sr_0.04

Hongu, H.Yoshiasa, A.Teshima, A.Isobe, H.Sugiyama, K.Arima, H.Nakatsuka, A.Momma, K.Miyawaki, R.

Journal of Mineralogical and Petrological Sciences (2018) 113, 152-158

a=6.7103(3)Å   b=11.1619(5)Å   c=7.3741(3)Å

α=90°   β=94.919(2)°   γ=90°