Whitlockite

Ca₉HMgO₂₈P₇

Gopal, R.Calvo, C.Ito, J.Sabine, W. K.

Canadian Journal of Chemistry (1974) 52, 1155-1164

a=10.350Å   b=10.350Å   c=37.085Å

α=90°   β=90°   γ=120°