Tilasite

AsCaFMgO₄

Bladh, K. W.Corbett, R. K.McLean, W. J.Laughon, R. B.

American Mineralogist (1972) 57, 1880-1884

a=6.688Å   b=8.944Å   c=7.570Å

α=90°   β=121.17°   γ=90°