HMn1.933NaO9Si3
Jacobsen, S. D.Smyth, J. R.Swope, R. J.Sheldon, R. I.
American Mineralogist (2000) 85, 745-752
a=7.7185Å b=6.9064Å c=6.7624Å
α=90.492° β=94.085° γ=102.775°
HMn1.924NaO9Si3
a=7.7163Å b=6.9116Å c=6.7368Å
α=90.465° β=94.037° γ=102.844°