Microcline

AlK_0.89Na_0.11O₈Si₃

Griffen, D. T.Johnson, B. T.

American Mineralogist (1984) 69, 1072-1077

a=8.552Å   b=12.975Å   c=7.205Å

α=90.09°   β=115.92°   γ=89.51°