Ardealite

CaH₄O₆P_0.5S_0.5

Sakae, T.Nagata, H.Sudo, T.

American Mineralogist (1978) 63, 520-527

a=5.721Å   b=30.992Å   c=6.250Å

α=90°   β=117.26°   γ=90°