AlH3O3
Clark, G. R.Rodgers, K. A.Henderson, G. S.
Zeitschrift für Kristallographie (1998) 213, 2 96-100
a=4.9997Å b=5.1681Å c=4.9832Å
α=97.444° β=118.688° γ=104.661°
Na2O7Si3
Fleet, M. E.Henderson, G. S.
Physics and Chemistry of Minerals (1995) 22, 383-386
a=8.922Å b=4.8490Å c=11.567Å
α=90° β=102.64° γ=90°