Al2.28O4.86Si0.72
Popović, J.Tkalčec, E.Gržeta, B.Kurajica, S.Schmauch, J.
American Mineralogist (2007) 92, 408-411
a=7.5520Å b=7.6872Å c=2.8843Å
α=90° β=90° γ=90°
Al2.25Co0.015O4.86Si0.735
Popovic, J.Tkalcec, E.Grzeta, B.Kurajica, S.Schmauch, J.
a=7.5618Å b=7.6882Å c=2.8860Å