Beusite

Ca_1.18Fe_0.9Mn_0.92O₈P₂

Wise, M. A.Hawthorne, F. C.Cerny, P.

The Canadian Mineralogist (1990) 28, 141-146

a=8.797Å   b=11.758Å   c=6.170Å

α=90°   β=99.31°   γ=90°